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EFFECTS OF PLYOMETRIC JUMP TRAINING ON RUNNING ECONOMY IN ENDURANCE RUNNERS: A SYSTEMATIC REVIEW AND META-ANALYSIS
(University of Zagreb - Faculty of Kinesiology, 0023-12-31) Barrio, Ekaitz Dudagoitia; Fernández-Landa, Julen; Negra, Yassine; Ramirez-Campillo, Rodrigo; de Alcaraz, Antonio García
Running economy (RE) has a strong relationship with distance running performance and is defined as the energy demand for a given velocity. Plyometric jump training may improve RE. The present study aimed to assess the effects of plyometric jump training on endurance runners’ running economy and to estimate the effectiveness of program duration, training frequency, total sessions, age, training status and velocity. A literature search was performed using PubMed/MEDLINE, Web of Science, and SCOPUS databases. Subgroup and single training factor analyses of program duration, frequency, total sessions, chronological age, training status, and running velocity were performed. A random-effects model for meta-analyses was used. Eighteen studies were selected for the systematic review and 10 for the meta-analysis. A trivial effect was noted for plyometric jump training on running economy (ES=0.19). However, plyometric jump training combined with resistance training revealed a large effect on running economy (ES=1.34). Greater running economy improvements were noted after training interventions with >15 total sessions (ES=1.00), >7 weeks (ES=0.95) and >2 days/week (ES=0.89). The youngest (ES=0.95) and highly trained participants (ES=0.94) with faster velocities (ES=0.95) obtained better results. Our findings highlight the effect of plyometric jump training that may improve running economy, particularly in combination with resistance training, after longerterm interventions (i.e., >15 total sessions, >7 weeks), with greater frequency, and among younger and more highly trained runners, especially during running at higher competitive velocities. © 2023, University of Zagreb - Faculty of Kinesiology. All rights reserved.
Elastic Bands During Half-Squats as A Re-Warm-Up Strategy for Youth Soccer Players' Performance
(Journal of Sport Science and Medicine, 0024-12) Sanchez-Sanchez, Javier; Clemente, Filipe Manuel; Ramirez-Campillo, Rodrigo; Rodríguez-Fernández, Alejandro
The study aimed to assess the immediate effects of re-warm-up strategies using half-squats with elastic looped bands on the performance of youth soccer players. A cross-over study design with repeated measures was implemented in field youth male soccer players (n = 20, age 15.7 ± 0.8 years). Following the first 45-min of match play, players were subjected to one of four re-warm-up (Re-w) interventions of equal duration: no Re-w (PAS), half-squat without elastic looped bands (SQ), half-squat with bands placed on the thighs (SQT), and half-squat with bands placed on the lower legs (SQL). These interventions were compared against a control condition (CON). The Re-w protocols were initiated 10-min after half-time, and players' performance was evaluated through vertical and horizontal jump tests, 20-m linear sprint, and T-agility test. Statistical analysis using ANOVA revealed that the SQT and SQL interventions significantly improved (p < 0.001) several performance metrics compared to the PAS and SQ conditions. These improvements were observed in squat jumps, unilateral squat jumps (both dominant and non-dominant legs), coun-termovement jumps, horizontal jumps, triple horizontal jumps, the 20-m linear sprint, and T-agility performance. In conclusion, SQT and SQL are equally effective to enhance performance as Re-w strategies after the 1st-half of a soccer match. However, the lack of physiological data and 2nd-half assessments suggests the need for further research to confirm the persistence of these ef-fects. © 2024, Journal of Sport Science and Medicine. All rights reserved.
Effects of Physical Exercise on Emotional Intelligence from Birth to Adolescence: A Systematic Review Protocol
(Multidisciplinary Digital Publishing Institute (MDPI), 0024-12) Contreras-Osorio, Falonn; Cerda-Vega, Enrique; Campos-Jara, Christian; Ramirez-Campillo, Rodrigo; Pérez-Romero, Nuria
Background: Emotional intelligence (EI) can be understood as a set of traits or abilities that may have an impact on academic, professional, or mental health. The aim of this protocol was to establish methodological guidelines for a systematic review and meta-analysis of the effects of acute and chronic physical exercise on EI from birth to 21 years (late adolescence). Methods: This protocol followed PRISMA-P guidelines and will be modified in PROSPERO after peer review. The review will include experimental randomized and non-randomized control studies involving physical exercise interventions. PubMed, Web of Science, Scopus, and EBSCO will be utilized for study selection following the publication of the protocol. The risk of bias will be assessed using the ROBINS-I tool, ROB-2, and the GRADE approach will evaluate the certainty of evidence. Random effect meta-analyses will analyse the effect of physical exercise compared with control groups, using effect sizes measures (Hedges’ g), with a 95% confidence interval and prediction interval, for each EI outcome (perception, facilitation, understanding, regulation, and management of emotions). Potential moderators, such as exercise intensity, duration, and sociocultural factors, will be analysed. Heterogeneity will be assessed using the I2 statistic, and sensitivity analyses will be performed to ensure result robustness. Subgroup analyses may be conducted based on age groups and specific EI dimensions. Conclusions: Publication bias will be assessed using Egger’s test and the trim-and-fill method. The future results aim to provide a foundation for analysing the impact of physical exercise on EI development, potentially guiding future interventions in health, educational, and related fields. © 2024 by the authors.
Parental obesity, health determinants, and cardiometabolic risk according to sleep duration in schoolchildren: analysis through structural equations
(BioMed Central Ltd, 0024-12) Brand, Caroline; Batista Lemes, Vanilson; Paula Sehn, Ana; Agostinis-Sobrinho, Cesar; Henriquez-Maquehue, Fernanda; Jofré-Saldía, Emilio; Ibacache-Saavedra, Paulina; Farias-Valenzuela, Claudio; Villa-González, Emilio; Priscila Reuter, Cézane
Background: the independent association between parental obesity, sleep and lifestyle habits with cardiometabolic risk factors in children and adolescents has been widely explored in the literature. Our study represents a novel approach to comprehensively investigate a complex model encompassing various aspects associated with cardiometabolic risk in youth. Thus, the aim of the present study was to verify the relationship between parental obesity and cardiometabolic risk in children and adolescents, considering the mediator role of health indicators according to sleep time. Methods: This cross-sectional study was conducted on 3,973 children and adolescents aged 6 to 17 years attending public and private schools in a city located in Southern Brazil. Sleep duration, lifestyle, physical activity, natural food consumption, and parental obesity were evaluated through self-reported questionnaires. Physical fitness was evaluated according to the protocols of Projeto Esporte Brasil. The body fat percentage was evaluated through the measures of tricipital and subscapular folds, and the body mass index was calculated. The clustered metabolic risk score (cMetS) considered the summing z-scores of waist circumference, systolic blood pressure, triglycerides, total cholesterol/high-density lipoprotein cholesterol ratio, and fasting glucose, divided by five. A structural equation model was applied for statistical analysis. Results: The relationship between parental obesity and cardiometabolic risk was observed in children and adolescents with adequate sleep, being significant (p < 0.05) mediated by physical activity, natural food, physical fitness, and lifestyle. This was also observed when parental education was included in the inadequate sleep cluster model. Conclusion: Present findings underscore the importance of sufficient sleep duration as a critical factor in understanding the complex interplay between parental obesity and cardiometabolic risk in children and adolescents. © The Author(s) 2024.
Aortic pulse wave analysis and functional capacity of heart transplantation candidates: a pilot study
(Nature Research, 0024-12) Alcici-Moreira, Adriana Marques; Vitarelli, Marcela Oliveira; Velloso, Tiago Abreu; Carvalho-Ribeiro, Igor Antônio; Dario, Daniella Moura; Polese, Janaine Cunha; Guimarães, Hélio Penna; Pena, José Luiz Barros; Tuesta, Marcelo; Rodrigues-Machado, Maria da Glória
We compared cardiovascular parameters obtained with the Mobil-O-Graph and functional capacity assessed by the Duke Activity Status Index (DASI) before and after Heart Transplantation (HT) and also compared the cardiovascular parameters and the functional capacity of candidates for HT with a control group. Peripheral and central vascular pressures increased after surgery. Similar results were observed in cardiac output and pulse wave velocity. The significant increase in left ventricular ejection fraction (LVEF) postoperatively was not followed by an increase in the functional capacity. 24 candidates for HT and 24 controls were also compared. Functional capacity was significantly lower in the HT candidates compared to controls. Stroke volume, systolic, diastolic, and pulse pressure measured peripherally and centrally were lower in the HT candidates when compared to controls. Despite the significant increase in peripheral and central blood pressures after surgery, the patients were normotensive. The 143.85% increase in LVEF in the postoperative period was not able to positively affect functional capacity. Furthermore, the lower values of LVEF, systolic volume, central and peripheral arterial pressures in the candidates for HT are consistent with the characteristics signs of advanced heart failure, negatively impacting functional capacity, as observed by the lower DASI score. © The Author(s) 2024.
Effects of Physical Exercise on Emotional Intelligence from Birth to Adolescence: A Systematic Review Protocol
(Multidisciplinary Digital Publishing Institute (MDPI), 0024-12-04) Falonn Contreras-Osorio; Enrique Cerda-Vega; Christian Campos-Jara; Rodrigo Ramirez-Campillo; Nuria Pérez-Romero
Background: Emotional intelligence (EI) can be understood as a set of traits or abilities that may have an impact on academic, professional, or mental health. The aim of this protocol was to establish methodological guidelines for a systematic review and meta-analysis of the effects of acute and chronic physical exercise on EI from birth to 21 years (late adolescence). Methods: This protocol followed PRISMA-P guidelines and will be modified in PROSPERO after peer review. The review will include experimental randomized and non-randomized control studies involving physical exercise interventions. PubMed, Web of Science, Scopus, and EBSCO will be utilized for study selection following the publication of the protocol. The risk of bias will be assessed using the ROBINS-I tool, ROB-2, and the GRADE approach will evaluate the certainty of evidence. Random effect meta-analyses will analyse the effect of physical exercise compared with control groups, using effect sizes measures (Hedges’ g), with a 95% confidence interval and prediction interval, for each EI outcome (perception, facilitation, understanding, regulation, and management of emotions). Potential moderators, such as exercise intensity, duration, and sociocultural factors, will be analysed. Heterogeneity will be assessed using the I2 statistic, and sensitivity analyses will be performed to ensure result robustness. Subgroup analyses may be conducted based on age groups and specific EI dimensions. Conclusions: Publication bias will be assessed using Egger’s test and the trim-and-fill method. The future results aim to provide a foundation for analysing the impact of physical exercise on EI development, potentially guiding future interventions in health, educational, and related fields. © 2024 by the authors.
Morpho-functional characterization of an elite Chilean mountain runner: Insights from a high-performance case study
(Asociacion Espanola de Analisis del Rendimiento Deportivo, 0025) Nieto-Jiménez, Claudio; Martin, Eduardo Baez-San; Rojas-Valverde, Daniel; Yáñez-Sepúlveda, Rodrigo; Tuesta, Marcelo
Trail running (TR) is an endurance sport practised on irregular natural terrain with significant elevation changes. The aim was to analyse cardiorespiratory fitness parameters, bilateral body composition and maximal strength profiles in the lower limbs of elite Chilean trail runners. A 26-year-old Chilean amateur ultra trail runner was studied (body weight: 62.3 kg, height: 1.71 m, BMI: 21.2 kg/m2, lean mass: 54 kg (86.6%), muscle mass: 30.3 kg (48.6%), fat mass: 8.3 kg (13.3%) and a skeletal muscle mass index of 7.5 kg/m2). The subject participated in three laboratory sessions: 1) anthropometric and pulmonary measurements, 2) cardiopulmonary exercise testing (CPET) with heart rate variability (HRV) assessment, and 3) isometric and isokinetic lower limb strength assessment. During the CPET, VO2max, ventilatory and HRV thresholds were measured using the DFA a1 algorithm. Quadriceps muscle oxygen saturation (SmO2) was also recorded. The runner presented a VO2max of 75 ml/kg/min. SmO2 values during CPET were 67.2% at rest, 38.5% at VT1, 26.8% at VT2 and 17.2% at VO2max. The results showed that the first heart rate variability threshold (HRVT1) coincided with the ventilatory thresholds (VT1 and VT2). Isometric and isokinetic evaluation revealed a higher eccentric flexion/concentric extension ratio in the right hip compared to the left, with values of 2.58 for the right and 2.25 for the left. Aerobic fitness is essential for trail running performance. Ventilatory thresholds and HRV, together with SmO2, may be useful tools for monitoring muscle fatigue. The observed muscle strength imbalances between limbs highlight the importance of training for strength symmetry to maximise performance and reduce the risk of injury. Future studies on muscle oxygenation, respiratory function and muscle asymmetries may improve training strategies in TR. © 2025 ARD Asociación Española.
Effectiveness of hand-arm bimanual intensive therapy including lower extremities in the rehabilitation of children with cerebral palsy: A systematic review protocol
(BMJ Publishing Group, 0025) Qu, Ya-Lan; Harun, Dzalani; Chai, Siaw Chui; Ebner-Karestinos, Daniela; Araneda, Rodrigo; Zanudin, Asfarina
Introduction Cerebral palsy (CP) is a paediatric disorder with permanent impairment of movement and posture with a prevalence of about 2.11 in 1000 births in the world. Given the therapeutic effect of hand-arm bimanual intensive therapy including lower extremities (HABIT-ILE) in children with CP, a systematic review of the available literature on this topic is warranted. The objective of this study is to systematically review the effectiveness of HABIT-ILE on upper extremity, lower extremity and trunk outcomes within the domains of body functions and structures, activity and participation of the International Classification of Functioning, Disability and Health in children with CP. Methods and analysis This study will be conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Searches will be conducted in six databases: MEDLINE, PubMed, Cochrane Library, Scopus, OT seeker and Web of Science for available published literature. The grey literature sources will include WorldCat, National Technical Information Service, Agency for Healthcare Research and Quality, Open Grey, WHO and OpenDOAR. Manual searches of citations of included papers will be performed to collect all experimental studies of HABIT-ILE in children with CP. The level of evidence for included articles will be classified according to the level of evidence in the guidelines for systematic reviews on the American Occupational Therapy Association website. Based on the study design of the included articles, the risk of bias will be assessed using the revised Cochrane risk-of-bias tool, the Cochrane Risk Of Bias In Non-randomised Studies - of Interventions tool and the quality assessment tool recommended by the American Occupational Therapy Association. In order to synthesise the data, narrative synthesis will be used, along with meta-analysis, if available. Ethics and dissemination As this study only reviewed previously published articles, ethical approval was not required. The findings will be published in a peer-reviewed scientific journal. © Author(s) (or their employer(s)) 2025.
Comments on “high-intensity versus low-level laser in musculoskeletal disorders”
(Springer Science and Business Media Deutschland GmbH, 0025) De la Barra, Hernan; Liebano, Richard
Myokine Secretion Dynamics and Their Role in Critically Ill Patients: A Scoping Review
(Multidisciplinary Digital Publishing Institute (MDPI), 0025) Jalil, Yorschua; Damiani, L. Felipe; García-Valdés, Patricio; Basoalto, Roque; Gallastegui, Julen; Gutierrez-Arias, Ruvistay
Background/Objectives: Myokines can modulate organ function and metabolism, offering a protective profile against ICU complications beyond preventing local muscle wasting. This scoping review aims to explore and summarize the evidence regarding the secretion of myokines and their potential local or systemic effects in critically ill patients. Methods: A scoping review following Joana Briggs Institute recommendations was conducted. A systematic search of MEDLINE (Ovid), Embase (Ovid), CENTRAL, CINAHL (EBSCOhost), WoS, and Scopus was conducted from inception to February 2023. We included primary studies evaluating myokine secretion/concentration in critically ill adults undergoing physical rehabilitation interventions. Two independent reviewers performed study selection and data extraction. Results: Seventeen studies published between 2012 and 2023 were included. Most were randomized clinical trials (47%). Physical rehabilitation interventions included electrical muscle stimulation, as well as passive and active mobilization, delivered alone or combined, in single or daily sessions lasting 20–60 min. Twelve studies (70%) evaluated interleukin-6, while interleukin-10, tumour necrosis factor-α, Interleukin-8, and myostatin were also commonly studied. Thirteen studies (76%) reported changes in myokine secretion or gene expression, although no clear concentration change pattern emerged. Myokines involved in muscle protein synthesis and breakdown may protect against muscle waste and weakness. Conclusions: The study of myokine dynamics in critically ill patients highlights the systemic impact of physical rehabilitation. This emerging field has grown in interest over the past decade, offering significant research potential. However, challenges such as study design, small sample sizes, and variability in physical therapy protocols hinder a comprehensive understanding of myokine responses. © 2025 by the authors.
Morpho-functional characterization of an elite Chilean mountain runner: Insights from a high-performance case study
(Asociacion Espanola de Analisis del Rendimiento Deportivo, 0025) Nieto-Jiménez, Claudio; Martin, Eduardo Baez-San; Rojas-Valverde, Daniel; Yáñez-Sepúlveda, Rodrigo
Trail running (TR) is an endurance sport practised on irregular natural terrain with significant elevation changes. The aim was to analyse cardiorespiratory fitness parameters, bilateral body composition and maximal strength profiles in the lower limbs of elite Chilean trail runners. A 26-year-old Chilean amateur ultra trail runner was studied (body weight: 62.3 kg, height: 1.71 m, BMI: 21.2 kg/m2, lean mass: 54 kg (86.6%), muscle mass: 30.3 kg (48.6%), fat mass: 8.3 kg (13.3%) and a skeletal muscle mass index of 7.5 kg/m2). The subject participated in three laboratory sessions: 1) anthropometric and pulmonary measurements, 2) cardiopulmonary exercise testing (CPET) with heart rate variability (HRV) assessment, and 3) isometric and isokinetic lower limb strength assessment. During the CPET, VO2max, ventilatory and HRV thresholds were measured using the DFA a1 algorithm. Quadriceps muscle oxygen saturation (SmO2) was also recorded. The runner presented a VO2max of 75 ml/kg/min. SmO2 values during CPET were 67.2% at rest, 38.5% at VT1, 26.8% at VT2 and 17.2% at VO2max. The results showed that the first heart rate variability threshold (HRVT1) coincided with the ventilatory thresholds (VT1 and VT2). Isometric and isokinetic evaluation revealed a higher eccentric flexion/concentric extension ratio in the right hip compared to the left, with values of 2.58 for the right and 2.25 for the left. Aerobic fitness is essential for trail running performance. Ventilatory thresholds and HRV, together with SmO2, may be useful tools for monitoring muscle fatigue. The observed muscle strength imbalances between limbs highlight the importance of training for strength symmetry to maximise performance and reduce the risk of injury. Future studies on muscle oxygenation, respiratory function and muscle asymmetries may improve training strategies in TR. © 2025 ARD Asociación Española.
Maximal strength, sprint and jump performance in elite kumite karatekas
(BioMed Central Ltd, 0025) Cinarli, Fahri Safa; Aydogdu, Onur; Aydin, Yalcin; Tokgöz, Gürkan; Kahraman, Abdulselam; Beykumül, Ayşegü; Aygoren, Caner; Yılmaz, Nurkan; Ramirez-Campillo, Rodrigo
Background: Both maximal muscle strength and muscle power are independently important for karatekas. However, the relationship between strength and power in elite male kumite karatekas is under researched. This study aimed to determine the relationship between back-leg-chest (BLC) isometric muscle strength with sprint and jump variables in elite male karatekas. Methods: Male elite/international level (tier 4) kumite karatekas (n = 14; age, 20.79 ± 1.67 year; height, 1.77 ± 0.06 m; weight, 72.21 ± 5.20 kg) were recruited. BLC strength, sprint and jump values were measured with a dynamometer, a photocell, and an application, respectively. Pearson correlation (trivial r < 0.1; small r < 0.3; moderate r < 0.5; large r < 0.7; very large r < 0.9; nearly perfect/perfect r ≥ 0.9) and linear regression analyses were performed to determine the relationship and shared variance between BLC strength, sprint, and jump performance. Results: There were large to very large correlations between BLC strength and sprint time (r = − 0.930, p < 0.01), velocity (r = 0.918; p < 0.01), acceleration (r = 0.913; p < 0.01) and running momentum (r = 0.721; p < 0.01). Additionally, BLC strength correlated with jump height (moderate, r = 0.550, p < 0.05), peak anaerobic power (moderate, r = 0.672, p < 0.01) and power to body mass ratio (moderate, r = 0.545, p < 0.05). BLC strength and sprint variables showed an r2 = 0.52–0.86 (p < 0.01), while BLC strength and jump variables showed an r2 = 0.29–0.45 (p < 0.05). Conclusions: BLC strength is related to jump and sprint performance in male elite karate athletes. This relationship underscores the importance of including strength training that targets BLC muscle strength in training programs for coaches and athletes. © The Author(s) 2025.
Exertional Desaturation and Ambulatory Oxygen Therapy Requirements in People with Idiopathic Pulmonary Fibrosis. A Retrospective Study
(Fundacion Universitaria Maria Cano, 0025) Soler, Tamara; Cabrera, Osvaldo; Gutierrez-Arias, Ruvistay; Lara, Francisca; Benavides, María Guacolda
Introduction. Exertional desaturation (ED) is common in advanced idiopathic pulmonary fibrosis (IPF) stages. Ambulatory O2 therapy could increase physical activity by preventing ED in people with IPF. Objective. This study aimed to assess ED and ambulatory O2 requirements in people with IPF using a protocol that involved up to four 6-minute walking tests (6MWT). Method. An observational study of a dynamic retrospective cohort from a high-complexity hospital was conducted. The ambulatory O2 requirement assessment protocol involves performing up to four 6MWT depending on ED. All participants performed the baseline test (no additional O2). If ED (SpO2 < 90%) was observed, up to three additional 6MWTs were performed with two, four, and six O2 liters/minute until ED was avoided. Results. Twenty-eight patients (16 female; mean age 73 years) were referred for assessment of ambulatory O2 requirements. Twenty-three (82%) had ED during baseline 6MWT. Twenty-two patients performed the 6MWT with two liters/minute of O2, ten performed a third 6MWT with four liters/minute of O2, and seven with six liters/minute of O2. The six participants who performed all four 6MWTs significantly increased their walking distance by 56.33 meters (SD 36.45) compared to the baseline (p = 0.001). Four of the seven patients (57.14%) who performed the last 6MWT had ED despite O2 supplementation. Conclusion. The prevalence of ED during baseline 6MWT was high. Some participants even experienced ED with six liters/minute of supplemental O2. Despite this, walking distance increased more than the learning effect. © 2025. María Cano University Foundation.
Effects of Active Video Games Combined with Conventional Physical Therapy on Perceived Functionality in Older Adults with Knee or Hip Osteoarthritis: A Randomized Controlled Trial
(Multidisciplinary Digital Publishing Institute (MDPI), 0025) Guede-Rojas, Francisco; Mendoza, Cristhian; Fuentes-Contreras, Jorge; Alvarez, Cristian; Agurto Tarbes, Bárbara; Muñoz-Gutiérrez, Javiera Karina; Soto-Martínez, Adolfo; Carvajal-Parodi, Claudio
Background: Osteoarthritis (OA) leads to functional decline in older adults. This study aimed to evaluate the effectiveness of active video games (AVGs) as a complement to conventional physical therapy (CPT) in improving functional disability. Methods: Sixty participants were randomly assigned to an experimental group (EG, n = 30, 68.7 ± 5.4 years), which received CPT combined with AVGs, or to a control group (CG, n = 30, 69.0 ± 5.5 years), which received CPT alone. Sessions were performed three times a week for ten weeks. Functional disability was assessed using the WOMAC index before, during, and after the intervention. Secondary outcomes included the Global Rating of Change (GRoC), the Minimal Clinically Important Difference, and patient trajectories through functional disability strata. Results: The EG showed progressive improvements in all WOMAC scores, with moderate to large increases by the end of the intervention, while the CG only showed significant changes in the later stages. The EG demonstrated greater improvements in WOMAC pain and the GroC scale (p < 0.05), maintaining most of the gains at follow-up, whereas the CG showed regression. Additionally, the EG had a higher proportion of responders, particularly for pain, while the CG had a predominance of non-responders and adverse responders. In the EG, 70% improved their functional disability stratification compared to 50% in the CG. Conclusion: Integration of AVGs with CPT further improves perceived functional disability in older adults with OA. Future research should explore these findings further. © 2024 by the authors.
Massage-Like Sensation and Tissue Mobilization During Phonation With Two Oscillatory Positive Expiratory Pressure Devices
(0025) Guzman, Marco; Quezada, Camilo; Castro, Christian; Castillo, Monserrat; Ibarra, Josefina; Vásquez, Melanie
PURPOSE: This study primarily aimed at observing whether high-frequency vibration devices generate tissue mobilization on facial, neck, and chest tissues. An additional objective was to inspect resulting self-perceived sensation of massage-like sensation. METHOD: Fifty-two participants engaged in a set of three phonatory tasks: (a) phonation with Shaker Medic Plus device, (b) phonation with Acapella Choice device, and (c) sustained vowel [a:] (control task). Self-perceived massage-like sensation was also assessed. All exercises were performed at three loudness levels. Tissue mobilization was captured by four accelerometers placed in four different locations: (a) over the cheek, (b) over the neck, (c) over the thyroid cartilage, and (d) over the suprasternal notch. Frequency, amplitude, and regularity of tissue oscillation were measured. RESULTS: Analyses of variance showed significant second-order interactions for vibration amplitude and frequency. A two-way interaction (Task × Location) was observed for jitter, and no significant interactions were found for shimmer. Self-perceived massage-like sensation results showed that Acapella and Shaker generate almost identical effects, both being significantly higher to the one delivered by vowel [a:]. CONCLUSION: Both Acapella and Shaker devices are able to mobilize tissues. Tasks, loudness level, and location could produce an effect on tissue oscillation variables. The Acapella device tends to produce a larger amplitude of vibration than the Shaker does. However, self-reported sensation of massage is virtually the same for both devices. Control of dependent variables of tissue oscillation (frequency, amplitude, and regularity) is apparently relevant to obtain the greatest massage-like effect in patients.
Effects of Active Video Games Combined with Conventional Physical Therapy on Perceived Functionality in Older Adults with Knee or Hip Osteoarthritis: A Randomized Controlled Tria
(Multidisciplinary Digital Publishing Institute (MDPI), 0025-01) Guede-Rojas, Francisco; Mendoza, Cristhian; Fuentes-Contreras, Jorge; Alvarez, Cristian; Agurto Tarbes, Bárbara; Muñoz-Gutiérrez, Javiera Karina; Soto-Martínez, Adolfo f; Carvajal-Parodi, Claudio
Background: Osteoarthritis (OA) leads to functional decline in older adults. This study aimed to evaluate the effectiveness of active video games (AVGs) as a complement to conventional physical therapy (CPT) in improving functional disability. Methods: Sixty participants were randomly assigned to an experimental group (EG, n = 30, 68.7 ± 5.4 years), which received CPT combined with AVGs, or to a control group (CG, n = 30, 69.0 ± 5.5 years), which received CPT alone. Sessions were performed three times a week for ten weeks. Functional disability was assessed using the WOMAC index before, during, and after the intervention. Secondary outcomes included the Global Rating of Change (GRoC), the Minimal Clinically Important Difference, and patient trajectories through functional disability strata. Results: The EG showed progressive improvements in all WOMAC scores, with moderate to large increases by the end of the intervention, while the CG only showed significant changes in the later stages. The EG demonstrated greater improvements in WOMAC pain and the GroC scale (p < 0.05), maintaining most of the gains at follow-up, whereas the CG showed regression. Additionally, the EG had a higher proportion of responders, particularly for pain, while the CG had a predominance of non-responders and adverse responders. In the EG, 70% improved their functional disability stratification compared to 50% in the CG. Conclusion: Integration of AVGs with CPT further improves perceived functional disability in older adults with OA. Future research should explore these findings further. © 2024 by the authors.
Analysis of Magnitude and Direction of Body Composition Asymmetries in Male Brazilian Jiu-Jitsu Athletes: Pilot Study
(Multidisciplinary Digital Publishing Institute (MDPI), 0025-02) Ojeda-Aravena, Alex; Kons, Rafael L; Azócar-Gallardo, Jairo; Dopico-Calvo, Xurxo; Fernández, Aida; Tuesta-Roa, Marcelo; Cresp-Barria, Mauricio; Olivares-Arancibia, Jorge; Báez-San Martín, Eduardo
In order to optimize body composition and its components, it is of interest to analyze inter-limb asymmetries in athletes of popular combat sports such as Brazilian Jiu-Jitsu (BJJ). This study aimed to assess the magnitude and direction of body composition asymmetry in competitive male BJJ athletes. Seventeen experienced and competitive male BJJ athletes (age 34.59 ± 8.00 years, 172.94 ± 5.46 cm, BJJ experience 7.88 ± 5.57 years, and 3.71 ± 1.05 days of weekly volume training), including Guard Fighters (n = 7) and Pass Fighters (n = 10), participated in this study. In a single session, whole-body and segmental upper limb and lower limb body composition (BC) was assessed utilizing dual-energy X-ray absorptiometry (DXA). The assessment included total mass (TM), fat mass (FM), fat mass percentage (%FM), fat-free mass (FFM), and bone mineral content (BMC). Absolute differences between limbs were analyzed using a paired t-test. A comparison of BC asymmetries according to combat styles was conducted using an independent t-test. The effect size (ES) was interpreted as Cohen’s d. The main results revealed significant asymmetries in the upper limbs (ULs) of the total group; greater values were found on the left side for TM (p = 0.009, ES = 0.725), FM (p = 0.016, ES = 0.650), FFM (p = 0.026, ES = 0.594), and BMC (p < 0.001, ES = 0.993). In Pass Fighters, differences favored the right side in TM (p = 0.003, ES = 1.277), FM (p = 0.009, ES = 1.039), FFM (p = 0.011, ES = 1.000), and BMC (p < 0.001, ES = 1.916). In contrast, Guard Fighters showed no discrepancies in these parameters. No notable disparities were observed in the lower limbs. This pilot study reveals that BJJ athletes present significant asymmetries in BC, particularly in the ULs, with a marked predominance on the right side, especially in Pass Fighters. © 2025 by the authors.
Impact of Lower-Volume Training on Physical Fitness Adaptations in Team Sports Players: A Systematic Review and Meta-analysis
(Springer Science and Business Media Deutschland GmbH, 0025-12) Clemente, Filipe Manuel; Ramirez-Campillo, Rodrigo; Moran, Jason; Zmijewski, Piotr; Silva, Rui Miguel; Randers, Morten Bredsgaard
A small number of reviews have explored lower- versus higher-volume training in non-athletes, but the growing challenge of congested schedules in team sports highlights the need to synthesize evidence specific to team sport athletes. Thus, the objectives of this systematic review with meta-analysis are twofold: (i) to summarize the primary physiological and physical fitness outcomes of lower-volume versus higher-volume training interventions in team sports players; and (ii) to compare the effects of lower-volume training with higher, considering the training modalities used. Methods: We conducted searches across key databases, including PubMed, Scopus, SPORTDiscus, and Web of Science. We included team sports players with at least a trained or developmental level, focusing on studies comparing different training volumes (lower vs higher) within the same research. Lower volume training was defined in comparison to another load, emphasizing smaller training volume in terms of repetitions, duration, or frequency. The studies had to examine key physical performance adaptations and use two-arm or multi-arm designs. Methodological assessments of the included studies were performed using the Rob2 and ROBINS-I instruments, with evidence certainty evaluated through GRADE. Results: The initial search yielded 5,188 records, with 17 articles deemed eligible for the review. There was a non-significant trend favoring the higher-volume training group over the lower-volume group in resistance-based training when considering all pooled physical fitness outcomes (effect size − 0.05, 95% CI − 0.19 to 0.09, p = 0.506, I2 = 0.0%). A meta-analysis was not conducted for aerobic-based training due to only two studies being available, with one showing that lower volume training improved maximal oxygen uptake by 3.8% compared to 1.3% for higher volume, while the other indicated that lower training volumes enhanced performance by 1.6% versus 0.8%. The evidence certainty for physical performance outcomes was very low. Conclusions: In newly introduced resistance training, lower volumes—regardless of repetitions or frequency—can achieve similar fitness gains to higher volumes. More pronounced tapering also appears more effective for supercompensation. However, the variability in study designs and training methods makes it difficult to establish a clear minimal dose. The main contribution of this review is mapping current research, providing a foundation for future studies and training optimization.
Maximal strength, sprint and jump performance in elite kumite karatekas
(BioMed Central Ltd, 0025-12) Cinarli, Fahri Safa; Aydogdu, Onur; Aydin, Yalcin; Tokgöz, Gürkan; Kahraman, Abdulselam; Beykumül, Ayşegül; Aygoren, Caner; Yılmaz, Nurkan; Ramirez-Campillo, Rodrigo i
Background: Both maximal muscle strength and muscle power are independently important for karatekas. However, the relationship between strength and power in elite male kumite karatekas is under researched. This study aimed to determine the relationship between back-leg-chest (BLC) isometric muscle strength with sprint and jump variables in elite male karatekas. Methods: Male elite/international level (tier 4) kumite karatekas (n = 14; age, 20.79 ± 1.67 year; height, 1.77 ± 0.06 m; weight, 72.21 ± 5.20 kg) were recruited. BLC strength, sprint and jump values were measured with a dynamometer, a photocell, and an application, respectively. Pearson correlation (trivial r < 0.1; small r < 0.3; moderate r < 0.5; large r < 0.7; very large r < 0.9; nearly perfect/perfect r ≥ 0.9) and linear regression analyses were performed to determine the relationship and shared variance between BLC strength, sprint, and jump performance. Results: There were large to very large correlations between BLC strength and sprint time (r = − 0.930, p < 0.01), velocity (r = 0.918; p < 0.01), acceleration (r = 0.913; p < 0.01) and running momentum (r = 0.721; p < 0.01). Additionally, BLC strength correlated with jump height (moderate, r = 0.550, p < 0.05), peak anaerobic power (moderate, r = 0.672, p < 0.01) and power to body mass ratio (moderate, r = 0.545, p < 0.05). BLC strength and sprint variables showed an r2 = 0.52–0.86 (p < 0.01), while BLC strength and jump variables showed an r2 = 0.29–0.45 (p < 0.05). Conclusions: BLC strength is related to jump and sprint performance in male elite karate athletes. This relationship underscores the importance of including strength training that targets BLC muscle strength in training programs for coaches and athletes.
Maximal strength, sprint and jump performance in elite kumite karatekas
(BioMed Central Ltda, 0025-12) Cinarli, Fahri Safa; Aydogdu, Onur; Aydin, Yalcin; Tokgöz, Gürkan; Kahraman, Abdulselam; Beykumül, Ayşegül; Aygoren, Caner; Yılmaz, Nurkan; Ramirez-Campillo, Rodrigo
Background: Both maximal muscle strength and muscle power are independently important for karatekas. However, the relationship between strength and power in elite male kumite karatekas is under researched. This study aimed to determine the relationship between back-leg-chest (BLC) isometric muscle strength with sprint and jump variables in elite male karatekas. Methods: Male elite/international level (tier 4) kumite karatekas (n = 14; age, 20.79 ± 1.67 year; height, 1.77 ± 0.06 m; weight, 72.21 ± 5.20 kg) were recruited. BLC strength, sprint and jump values were measured with a dynamometer, a photocell, and an application, respectively. Pearson correlation (trivial r < 0.1; small r < 0.3; moderate r < 0.5; large r < 0.7; very large r < 0.9; nearly perfect/perfect r ≥ 0.9) and linear regression analyses were performed to determine the relationship and shared variance between BLC strength, sprint, and jump performance. Results: There were large to very large correlations between BLC strength and sprint time (r = − 0.930, p < 0.01), velocity (r = 0.918; p < 0.01), acceleration (r = 0.913; p < 0.01) and running momentum (r = 0.721; p < 0.01). Additionally, BLC strength correlated with jump height (moderate, r = 0.550, p < 0.05), peak anaerobic power (moderate, r = 0.672, p < 0.01) and power to body mass ratio (moderate, r = 0.545, p < 0.05). BLC strength and sprint variables showed an r2 = 0.52–0.86 (p < 0.01), while BLC strength and jump variables showed an r2 = 0.29–0.45 (p < 0.05). Conclusions: BLC strength is related to jump and sprint performance in male elite karate athletes. This relationship underscores the importance of including strength training that targets BLC muscle strength in training programs for coaches and athletes. © The Author(s) 2025.

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