Examinando por Autor "Guede Rojas, Francisco"

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    Ítem
    Characterizing the interindividual postexercise hypotension response for two order groups of concurrent training in patients with morbid obesity
    (Frontiers Media S.A., 2022-10-10) Álvarez, Cristian; Guede Rojas, Francisco; Ramírez Campillo, Rodrigo; Andrade, David C.; Vásquez Gómez, Jaime; Rodríguez Rodríguez, Fernando; Ciolac, Emmanuel Gomes; Caamaño Navarrete, Felipe; Delgado Floody, Pedro
    Background: Postexercise hypotension (PEH) is a common physiological phenomenon occurring immediately after endurance training (ET), resistance training (RT), and ET plus RT, also termed concurrent training (CT); however, there is little knowledge about the interindividual and magnitude response of PEH in morbidly obese patients. Aim: The aims of this study were (1) to investigate the effect of CT order (ET + RT vs. RT + ET) on the blood pressure responses; 2) characterize these responses in responders and nonresponders, and 3) identify potential baseline outcomes for predicting blood pressure decreases as responders. Methods: A quasi-experimental study developed in sedentary morbidly obese men and women (age 43.6 ± 11.3 years; body mass index [BMI] ≥40 kg/m2) was assigned to a CT group of ET plus RT (ET + RT; n = 19; BMI 47.8 ± 16.7) or RT plus ET order group (RT + ET; n = 17; BMI 43.0 ± 8.0). Subjects of both groups received eight exercise sessions over four weeks. Primary outcomes include systolic (SBP), diastolic (DBP), mean arterial pressure [MAP], heart rate at rest [HR], and pulse pressure [PP] measurements before and after 10 min post-exercise. Secondary outcomes were other anthropometric, body composition, metabolic, and physical fitness parameters. Using the delta ∆SBP reduction, quartile categorization (Q) in “high” (Rs: quartile 4), “moderate” (MRs: quartile 3), “low” (LRs: quartile 2), and “nonresponders” (NRs: quartile 1) was reported. Results: Significant pre–post changes were observed in ET + RT in session 2 for SBP (131.6 vs. 123.4 mmHg, p = 0.050) and session 4 (131.1 vs. 125.2 mmHg, p = 0.0002), while the RT + ET group showed significant reductions in session 4 (134.2 vs. 125.3 mmHg, p < 0.001). No significant differences were detected in the sum of the eight sessions for SBP (∑∆SBP) between ET + RT vs. RT + ET (−5.7 vs. −4.3 mmHg, p = 0.552). Interindividual analyses revealed significant differences among frequencies comparing Q1 “NRs” (n = 8; 22.2%), Q2 “LRs” (n = 8; 22.2%), Q3 “MRs” (n = 9; 25.0%), and Q4 “HRs” (n = 11; 30.5%), p < 0.0001. Quartile comparisons showed significant differences in SBP changes (p = 0.035). Linear regression analyses revealed significant association between ∑∆SBP with body fat % (β –3.826, R2 0.211 [21.1%], p = 0.031), skeletal muscle mass [β –2.150, R2 0.125 (12.5%), p = 0.023], fasting glucose [β 1.273, R2 0.078 (7.8%), p = 0.003], triglycerides [β 0.210, R2 0.014 (1.4%), p = 0.008], and the 6-min walking test [β 0.183, R2 0.038 (3.8%), p = 0.044]. Conclusion: The CT order of ET + RT and RT + ET promote a similar ‘magnitude’ in the postexercise hypotensive effects during the eight sessions of both CT orders in 4 weeks of training duration, revealing “nonresponders” and ‘high’ responders that can be predicted from body composition, metabolic, and physical fitness outcomes. Copyright © 2022 Álvarez, Guede-Rojas, Ramírez-Campillo, Andrade, Vásquez-Gómez, Rodríguez-Rodríguez, Ciolac, Caamaño-Navarrete and Delgado-Floody.
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    Ítem
    Effect of muscle strength at different intensities on resting energy expenditure
    (University of Alicante, 2017) Barboza González, Paola; Ríos, Luis Javier Chirosa; Díaz, David Ulloa; Ríos, Ignacio Chirosa; Urra, Sergio Fuentealba; Guede Rojas, Francisco; Herrera, Sebastián Mardones; Torres, Esteban Rebolledo
    Introduction: the regular practice of physical exercise is an important modulator of resting energy expenditure (REE), which depending on the intensity, duration, and type of exercise can increase the REE in an acute manner as well as long term. The effects of dynamic muscular strength exercises on the REE have been treated very little in literature. Objective: compare the effect of muscle strength exercise (MSE) at different intensities on the REE in young males. Methods: Intra-group design. Fourteen subjects aged 22,5±1,5 < active (IPAQ= MET≥3000 week), realized two sessions of strength exercises at 2 intensities (40% and 80%RM), in 3 types of exercises (90° Squats; Bicep Curls, and Upright Row). Each session evaluated the same number of sets (3), repetitions (6), and rest time between sets (2min.). The REE was measured beforehand, immediately after, and 24 hours after by indirect calorimetry. Results: The REEpost (kcal/day) increased after the MSE at 40%RM, (p < 0,05; CI=1950,67-2215,62) and at 80%RM, (p < 0,001; CI=1947,10-2154,62), for a high and moderate effect size respectively. Differences in the % of change for both intensities (p < 0,05) and a high effect size for 40%RM and moderate for 80%RM were found. No differences were found in the comparison (kcal/day) between REEpre y REEpost 24h (p > 0,05) after the exercise at 40%RM. The REEpost 24h was maintained according to the REEpre when the intensity was 80%RM. Conclusion: The REEpost exercise is independent of the intensity of the exercise and only is maintained after 24 hours when the MSE is at a high intensity. © Faculty of Education. University of Alicante.
  • Miniatura
    Ítem
    Fuerza prensil de mano y su asociación con la edad, género y dominancia de extremidad superior en adultos mayores autovalentes insertos en la comunidad. Un estudio exploratorio
    (Sociedad Médica de Santiago, 2015) Guede Rojas, Francisco; Chirosa Ríos, Luis Javier; Vergara Ríos, César; Fuentes Contreras, Jorge; Delgado Paredes, Francisco; Valderrama Campos, María José
    Background: Hand grip strength could be influenced by gender, age and handedness. Aim: To describe differences in grip strength for age, gender and upper extremity handedness in non-disabled community-dwelling older adults. Material and Methods: We studied 47 males aged 72.3 ± 5.6 years and 69 females 72.4 ± 6.0 years who were divided in two age groups (65-70 and ≥ 71 years old). Grip strength was determined by a standardized protocol using a hand dynamometer. Results: There was an inverse correlation between grip strength and age in both hands only among men (p ≤ 0.05). When analyzing both genders, there was a significant inverse correlation between grip strength and age only in the dominant hand (p ≤ 0.05). Strength was higher in the dominant hand in both genders (p ≤ 0.05). It was also higher in men, compared to women in the two age groups studied (p ≤ 0.05). Conclusions: Grip strength is higher in men than women, it decreases with age and is higher in the dominant hand.