Abbreviations: HRV, heart rate variability; ANS, autonomic nervous system; HR, heart rate; DFA, detrended fluctuation analysis; BSJT, blasco specific judo test; VO 2 max, maximum oxygen consumption; SDNN, standard deviation of normal R-R intervals; Rmssd, root mean square difference of successive normal R-R intervals; LF, low frequency power; HF, high frequency power; TP, total power; SPSS, statistical package for the social sciences; ES, effect size; SD, ftandard deviation; RFD, rate of force development; TL PU, time limit pull-up; RFEYDA, spanish judo federation. IntroductionDuring the last decade, Heart Rate Variability (HRV), analyzed both in time and spectral domains, has been widely used as a noninvasive marker of that ANS regulation of HR dynamics after exercise. Several studies have actually used it to explore post exercise parasympathetic reactivation and evaluate the influence of exercise duration and intensity, 1−9 In this context, the nonlinear approaches have shown to be a way to gain additional information regarding cardiac autonomic modulation after exercise.3,10−12 Unlike time domain and spectral measures, nonlinear methods detect qualitative rather than quantitative changes in HR dynamics.13,14 Fractal analysis, through Detrended fluctuation analysis (DFA) technique, could be considered as a modification of spectral analysis; but unlike the latter, the former is thought not to be polluted by changes in the external environment,15−17 what makes it especially suitable for assessing HR dynamics in field-based situations. However, only a pair of studies regarding post exercise HRV recovery had previously focused on gender comparison. 18,19 Brown and Brown 18 found no significant differences in any frequency domain HRV index after a VO 2 max test to exhaustion in a trained Master athlete's sample. On the contrary, very recently Mendonca et al. 19 in a non-athletes sample, showed that cardiac autonomic function of women is greater affected by supra maximal exercise than that of men.Concerning autonomic regulation following judo-type efforts, Cottin et al.20 compared a judo combat versus an incremental cycloergometric exercise, but they evaluated the exercise-phase and not the recovery-phase. And very recently, some studies with judokas have shown that HRV and more specifically the non-linear analyses, are suitable to reflect the autonomic impairment following supra maximal efforts, with lower DFA in those judokas who were able to perform better (i.e. more repetitions in a supra maximal test). 2,3However, none of these studies has focused in gender differences regarding HR dynamics and autonomic recovery following judo supra maximal efforts. Even more, little research has been conducted with regard to gender differences in judo performance in an integrative test, with high demands on specific explosive-strength endurance and technical stability under fatigue.We need to deepen on the relationship among specific technical skills and conditional capacities with regard to these HR dynamics during recovery ...
El cierre de centros deportivos y suspensión de entrenamientos y competiciones provocadas por la COVID-19 conllevó una merma importante en la actividad física de los deportistas de alto rendimiento. El objetivo de este estudio fue conocer si un programa de entrenamiento supervisado online, orientado a la fuerza, fue capaz de mejorar la altura y potencia en el salto, y mitigar los efectos de la cuarentena en la agilidad. 51 jugadores de baloncesto de élite en formación (72.74 ± 13.30 kg; 1.85 ± .10 m), fueron divididos según categoría de edad (Infantil (U-14): 20 jugadores, 13.45 ± .51 años; Cadete (U-16): 22 jugadores, 15.59 ± .50 años; y Junior (U-18): 9 jugadores, 17.00 ± .50 años) y evaluados de composición corporal, fuerza explosiva (test de salto Abalakov, bilateral y unilateral) y agilidad (test V-Cut). Peso y BMI se vieron negativamente afectados. La fuerza explosiva mejoró tras la intervención (p < .001) en todas las variables y categorías, mientras la agilidad empeoró significativamente (p < .001), confirmando que la falta de espacio para realizar desplazamientos y la ausencia de orientación perceptiva-cognitiva en el entrenamiento son limitaciones determinantes, con peores consecuencias cuando aumenta la edad. La cuarentena obligatoria puede (y debe) verse como una oportunidad para el desarrollo de habilidades físicas básicas como la fuerza (prestando especial atención a las cargas de entrenamiento), siempre que se realice después un trabajo planificado y específico de reinserción al juego. Los preparadores físicos deben prestar especial atención a las cargas en un confinamiento, pues pueden ser insuficientes para deportistas más capaces y formados. Abstract: The closure of sports centers and suspension of training and competitions caused by COVID-19 led to a significant decrease in physical activity of high performance basketball players. The aim of this study was to investigate if a strength online training program was able to improve height and power in jumping, and to mitigate the effects of the quarantine in agility. Fifty-one elite youth basketball players (72.74 ± 13.30 kg; 1.85 ± .10 m), were divided into three age categories (Infants (U-14): 20 players, 13.45 ± .51 years; Cadets (U-16): 22 players, 15.59 ± .50 years; Juniors (U-18): 9 players, 17.00 ± .50 years) and evaluated for parameters related to body composition, explosive strength during jumping (bilateral and unilateral Abalakov test), and agility (V-Cut test). Weight and BMI were negatively affected. Explosive strength improved after the intervention (p < .001) in all variables and categories, while agility worsened significantly (p < .001), confirming that the lack of space to move and the absence of perceptual-cognitive orientation in training are important limitations, with worse consequences as age increases. Mandatory quarantine can (and should) be an opportunity for the development of basic physical skills such as strength (paying special attention to training loads), provided that a planned and specific work of reintegration into the game is carried out afterwards. Physical trainers should pay special attention to loads in confinement, as they may be insufficient for more capable and trained athletes.
Sedentary lifestyle combined with aging is associated with the genesis and development of cardiovascular diseases, Evidence for prescribing exercise in metabolic disorders in young and middle age individuals is overwhelming, but little is known regarding the effect of multicomponent exercise programs on the elderlies' metabolic health. The aim of this study was to analyze changes in blood pressure, lipid profile and cardiorespiratory fitness in a group of sedentary older adults following a two-days weekly multicomponent training (MCT) program (60 min/session). Thirteen elderly (70.77±3.72 years; 72.38±14.39 kg; 8 female) completed 15 weeks of MCT. Tryglicerydes (TG), Total cholesterol (TC), High Density Lipoprotein Cholesterol (HDL-c), Low Density Lipoprotein Cholesterol (LDL-c), blood pressure, and cardiorespiratory fitness were evaluated before and after training. Pre-post results showed significant improvements in cardiorespiratory fitness and blood pressure (p<0.05), and a trend to significance (p=0.06) for TC. A 2-days MCT short intervention improves metabolic health in sedentary old adults, although this dose (duration and time of training) seems not enough to impact blood lipid profile in this kind of training.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.