Examinando por Autor "Cadenas-Sanchez, Cristina"

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    Study protocol and rationale of the "cogni-action project" a cross-sectional and randomized controlled trial about physical activity, brain health, cognition, and educational achievement in schoolchildren
    (BioMed Central Ltd, 2019-07-26) Solis-Urra, Patricio; Olivares-Arancibia, Jorge; Suarez-Cadenas, Ernesto; Sanchez-Martinez, Javier; Rodríguez-Rodríguez, Fernando; Ortega, Francisco B.; Esteban-Cornejo, Irene; Cadenas-Sanchez, Cristina; Castro-Piñero, Jose; Veloz, Alejandro; Chabert, Steren; Saradangani, Kabir P.; Zavala-Crichton, Juan Pablo; Migueles, Jairo H.; Mora-Gonzalez, Jose; Quiroz-Escobar, Milton; Almonte-Espinoza, Diego; Urzúa, Alfonso; Dragicevic, Constantino D.; Astudillo, Aland; Méndez-Gassibe, Eduardo; Riquelme-Uribe, Daniel; Azagra, Marcela Jarpa; Cristi-Montero, Carlos
    Background: Education and health are crucial topics for public policies as both largely determine the future wellbeing of the society. Currently, several studies recognize that physical activity (PA) benefits brain health in children. However, most of these studies have not been carried out in developing countries or lack the transference into the education field. The Cogni-Action Project is divided into two stages, a cross-sectional study and a crossover-randomized trial. The aim of the first part is to establish the associations of PA, sedentarism, and physical fitness with brain structure and function, cognitive performance and academic achievement in Chilean schoolchildren (10-13 years-old). The aim of the second part is to determinate the acute effects of three PA protocols on neuroelectric indices during a working memory and a reading task. Methods: PA and sedentarism will be self-reported and objectively-assessed with accelerometers in a representative subsample, whilst physical fitness will be evaluated through the ALPHA fitness test battery. Brain structure and function will be assessed by magnetic resonance imaging (MRI) in a randomized subsample. Cognitive performance will be assessed through the NeuroCognitive Performance Test, and academic achievement by school grades. In the second part 32 adolescents (12-13 year-old) will be cross-over randomized to these condition (i) "Moderate-Intensity Continuous Training" (MICT), (ii) "Cooperative High-Intensity Interval Training" (C-HIIT), and (iii) Sedentary condition. Neuroelectric indices will be measures by electroencephalogram (EEG) and eye-tracking, working memory by n-back task and reading comprehension by a reading task. Discussion: The main strength of this project is that, to our knowledge, this is the first study analysing the potential association of PA, sedentarism, and physical fitness on brain structure and function, cognitive performance, and academic achievement in a developing country, which presents an important sociocultural gap. For this purpose, this project will use advanced technologies in neuroimaging (MRI), electrophysiology (EEG), and eye-tracking, as well as objective and quality measurements of several physical and cognitive health outcomes. Trial registration: ClinicalTrials.gov identifier: NCT03894241 Date of register: March 28, 2019. Retrospectively Registered. © 2019 The Author(s).
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    The effects of an exercise intervention on neuroelectric activity and executive function in children with overweight/obesity: The ActiveBrains randomized controlled trial
    (John Wiley and Sons Inc, 2024-01) Mora-Gonzalez, Jose; Esteban-Cornejo, Irene; Solis-Urra, Patricio; Rodriguez-Ayllon, María; Cadenas-Sanchez, Cristina; Hillman, Charles H.; Kramer, Arthur F.; Catena, Andrés; Ortega, Francisco B.
    Objective: To investigate whether a 20-week aerobic and resistance exercise program induces changes in brain current density underlying working memory and inhibitory control in children with overweight/obesity. Methods: A total of 67 children (10.00 ± 1.10 years) were randomized into an exercise or control group. Electroencephalography (EEG)-based current density (μA/mm2) was estimated using standardized low-resolution brain electromagnetic tomography (sLORETA) during a working memory task (Delayed non-matched-to-sample task, DNMS) and inhibitory control task (Modified flanker task, MFT). In DNMS, participants had to memorize four stimuli (Pokemons) and then select between two of them, one of which had not been previously shown. In MFT, participants had to indicate whether the centered cow (i.e., target) of five faced the right or left. Results: The exercise group had significantly greater increases in brain activation in comparison with the control group during the encoding phase of DNMS, particularly during retention of second stimuli in temporal and frontal areas (peak t = from 3.4 to 3.8, cluster size [k] = from 11 to 39), during the retention of the third stimuli in frontal areas (peak t = from 3.7 to 3.9, k = from 15 to 26), and during the retention of the fourth stimuli in temporal and occipital areas (peak t = from 2.7 to 4.3, k = from 13 to 101). In MFT, the exercise group presented a lower current density change in the middle frontal gyrus (peak t = −4.1, k = 5). No significant change was observed between groups for behavioral performance (p ≥ 0.05). Conclusion: A 20-week exercise program modulates brain activity which might provide a positive influence on working memory and inhibitory control in children with overweight/obesity. © 2023 The Authors. Scandinavian Journal of Medicine & Science In Sports published by John Wiley & Sons Ltd.
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    Which indices of cardiorespiratory fitness are more strongly associated with brain health in children with overweight/obesity?
    (John Wiley and Sons Inc, 2024-01) Haapala, Eero A.; Lubans, David R.; Jaakkola, Timo; Barker, Alan R.; Plaza-Florido, Abel; Gracia-Marco, Luis; Solis-Urra, Patricio; Cadenas-Sanchez, Cristina; Esteban-Cornejo, Irene; Ortega, Francisco B.
    Purpose: To compare the strength of associations between different indicesof cardiorespiratory fitness (CRF) and brain health outcomes in children withoverweight/obesity.Methods: Participants were 100 children aged 8–11 years. CRF was assessedusing treadmill exercise test (peak oxygen uptake [V̇O 2peak], treadmill time, andV̇O 2 at ventilatory threshold) and 20-metre shuttle run test (20mSRT, laps, run-ning speed, estimated V̇O 2peak using the equations by Léger et al., Mahar et al.,and Matsuzaka et al.). Intelligence, executive functions, and academic perfor-mance were assessed using validated methods. Total gray matter and hippocam-pal volumes were assessed using structural MRI.Results: V̇O 2peak/body mass (β = 0.18, 95% CI = 0.01–0.35) and treadmill time(β = 0.18–0.21, 95% CI = 0.01–0.39) were positively associated with gray mat-ter volume. 20mSRT laps were positively associated with executive functions (β = 0.255, 95% CI = 0.089–0.421) and academic performance (β = 0.199–0.255, 95%CI = 0.006–0.421), and the running speed was positively associated with executivefunctions (β = 0.203, 95% CI = 0.039–0.367). Estimated V̇O2peak/Léger et al. was posi-tively associated with intelligence, executive functions, academic performance,and gray matter volume (β = 0.205–0.282, 95% CI = 0.013–0.500). EstimatedV̇O 2peak/Mahar et al. and V̇O 2peak/Matsuzaka et al. (speed) were positively associated withexecutive functions (β = 0.204–0.256, 95% CI = 0.031–0.436).Conclusion: Although V̇O2peak is considered the gold standard indicator ofCRF in children, peak performance (laps or running speed) and estimatedV̇O 2peak/Léger et al. derived from 20mSRT had stronger and more consistent asso-ciations with brain health outcomes than other indices of CRF in children withoverweight/obesity