Jordan Hernandez-Martinez

Universidad de Los Lagos · Department of Physical and Sports Sciences

RESUMEN Objetivo: conocer si un estado de obesidad puede conducir a disminuciones en la fuerza y potencia muscular de mujeres adultas mayores. Método: se agruparon veintiuna mujeres mayores de sesenta años con un peso normal, sobre peso y con obesidad. Se midió la fuerza muscular del tren superior mediante fuerza de agarre de mano y potencia muscul...

Background/Objectives: This study aimed to assess and compare the effects of an adapted taekwondo (TKD) program, multicomponent training (MCT), walking exercise (WE), and inactive control group (CG) on blood pressure, morphological variables, frequency of food consumption, cognitive status, health-related quality of life (HRQoL), physical fitness t...

Background: The aim was to investigate the effects of 12 and 24 weeks of interdisciplinary interventions on health-related physical fitness, biochemical markers, and food processing levels in overweight or obese adolescents. Methods: Thirty-one adolescents completed 24 weeks of nutritional, psychoeducational, and physical activity interventions in...

This study aimed to analyze the effects of elastic band training (EBT) versus multicomponent training (MCT) and group-based dance (GBD) on waist circumference, body composition (body fat percentage and fat-free mass), and physical performance (handgrip strength, HGS; 30-s chair stand; timed up-and-go, TUG) in Chilean older women. Methods: This is a...

The aim of this scoping review was to compile the current evidence and provide a summary of the acute and chronic effects of muscle strength training on the physical fitness of amateur boxers and provide recommendations to optimize their physical performance. This scoping review was developed using guidance from the Joanna Briggs Institute and PRIS...

This study aimed to identify the relationship between body composition (fat-free mass and body fat percentage) and physical performance (countermovement jump, CMJ; throwing ball; maximal isometric handgrip strength, MIHS dominant and non-dominant hands; 10-m and 20-m sprints with and without ball) in Chilean professional basketball players. Its sec...

Objectives. This study aimed to compare the effects of wrestling and sumo wrestling as similar combat sports activities in a training program on technical wrestling scores, wrestling performance indexes, and intrinsic motivation in youth practitioners. Materials and methods. A randomized controlled trial using a single-blinded design, and repeated...

Objectives: This systematic review with meta-analysis aimed to evaluate the effects of elastic band training (EBT) on body composition and physical performance in apparently healthy older people. Methods: A systematic literature search was conducted between October 2023 and May 2024 using the core collection of six generic databases: PubMed, ProQue...

Background/Objectives: This study aimed to compare the effects of Xbox Kinect Sports (XKS) regarding Nintendo Switch Sports (NSS) and an inactive control group (CG) on body composition (body fat percentage, BFP; and fat-free mass) and physical performance (maximal isometric handgrip strength, MIHS; 30-s chair stand, 30-S; timed up-and-go, TUG; sit-...

This study analyzed differences in body composition, jump performance, running speed, and ball-kicking speed according to playing position in amateur female soccer players. This cross-sectional study involved 160 females distributed into groups of goalkeepers (n = 20), defenders (n = 38), midfielders (n = 52), and forwards (n = 50), with a mean age...

This overview assessed the available body of published peer-reviewed systematic reviews and meta-analyses related to the effects of active exergames compared with active/passive control on physical performance outcomes in older people. The methodological quality and certainty of evidence were assessed using PRISMA, AMSTAR 2, and GRADE. The protocol...

Introduction: This systematic review aimed to analyze the available body of published peer-reviewed studies on the effects of combat sports compared with active/passive control on cognitive function and electrophysiological markers of brain activity in older people. Evidence acquisition: The studies were searched in Scopus, Web of Science, PubMed,...

Introduction: Physical inactivity is a factor that contributes to increased cardiometabolic risk, such as overweight and obesity in schoolchildren. Aim: To associate physical activity habits with morphological variables (body mass index [BMI], waist circumference [WC], body fat, and fat-free mass), blood pressure, glycemia, handgrip strength (HGS),...

This study aimed to analyze the effect of plyometric training (PT) at different frequencies on jump performance, running sprint speed, and service speed in youth male volleyball players. The participants were randomly assigned to one PT session per week (Experimental Group 1, EG1, n = 15), two PT sessions per week (Experimental Group 2, EG2, n = 14...

This systematic review aimed to assess the available body of published peer-reviewed articles related to the effects of Olympic combat sports (OCS) on cardiorespiratory fitness (CRF) in the non-athlete population. The methodological quality and certainty of evidence were evaluated using PRISMA, TESTEX, RoB, and GRADE scales. The protocol was regist...

Background Sarcopenia is a syndrome associated with aging that causes progressive loss of skeletal muscle mass and muscle function. In this pilot study, we compared the effectiveness of elastic band training regarding group-based dance on fat mass, fat-free mass, handgrip strength (HGS; dominant and non-dominant hand), leg strength, timed up-and-go...

This study, called the TKD and Aging Project, aimed to analyze and compare the effects of an adapted taekwondo program concerning multicomponent training on blood pressure, morphological variables, food consumption frequency, health-related quality of life (HRQoL), physical fitness, handgrip strength, and postural balance in independent older women...

This study protocol aims to analyze and compare the effects of combined movement and storytelling intervention (CMSI) on fundamental motor skills (locomotor skills and object control), language development (language comprehension, language expression, vocabulary and language description), and physical activity levels (light intensity, moderate-to-v...

This study aimed to associate physical activity habits with cardiometabolic variables (blood pressure, fasting glucose, HDL cholesterol, and triglycerides), body composition (body fat percentage and fat-free mass), and physical performance (handgrip strength (HGS), timed up-and-go (TUG), and walking speed) in Chilean older women. An analytical cros...

This study aimed to describe and compare the body composition (SMM and body fat), handgrip strength, and countermovement jump (CMJ) between young and older females. A descriptive�comparative study, which evaluated 101 females distributed in: older physically active females (Old-PA; n = 26); older physically inactive females (Old-PI; n = 25); young...

[This corrects the article DOI: 10.3389/fphys.2023.1127669.].

This study aims to compare the effects of standard warm-up versus warm-up using stretching exercises on the physical performance of male youth soccer players. Eighty-five male soccer players (age: 10.3 ± 4.3 years; body mass index: 19.8 ± 4.3 kg/m²) were assessed for countermovement jump height (CMJ, cm), 10 m, 20 m and 30 m running sprint speed (s...

This study aimed to associate morphological variables and physical fitness with health-related quality of life (HRQoL) in physically active older people. A cross-sectional study was carried out that evaluated 470 older people (89.57% female) with a mean age of 70.13 (6.57) years, residing in two regions of Chile. Morphological variables (body weigh...

This study aims to analyze the effect of different types of warm-ups on handgrip strength (HGS) in physically inactive older females. Secondarily, it aims to compare HGS according to their baseline nutritional status. A randomized crossover trial study was conducted with 44 physically inactive older females distributed into normal weight (n = 12, B...

This systematic review and meta-analysis aimed to assess the available body of published peer-reviewed articles related to the effects of Olympic combat sports (OCS), compared with ac-tive/passive controls, on balance, fall risk, or falls in older adults. The TESTEX and GRADE scales assessed the methodological quality and certainty of evidence. The...

Objetivo: analizar si existe diferencia en la composición corporal por género y si esta influye sobre el rendimiento físico de jugadores de vóleibol adolecentes. Método: se agruparon veinticinco jugadores de vóleibol (Hombres n = 10, Mujeres n = 15). Se midió la composición corporal y potencia muscular mediante la prueba de salto en contra movimien...

Objective: To analyze the effects of 8 weeks of an active exergames training program on walking speed, static balance, timed up-and-go test, and sit-to-stand performance in older females. Methods: Two groups of participants were formed by block-design randomization as follows: (i) control group (n=12; age, 74.1±7.9 years); (ii) 8 week exergames tra...

Introduction: In recent years, handgrip strength assessment has gained special relevance in health. However, a standardized application protocol that includes warm-up procedures is required to measure it. Objective: To compare the acute effects of four warm-up strategies on maximal handgrip strength (MHS) in sedentary overweight women. Materials...

Background: Maximal voluntary isometric handgrip strength (MVIHS) is influenced by age, sex, and handedness. Aim: To assess the association of MVIHS with age, sex, and handedness in older adults. Material and Methods: MVIHS was measured using a digital dynamometer in 60 men and 60 women aged 73 ± 6 years. Weight, height and handedness were also rec...

Background: Maximal voluntary isometric handgrip strength (MVIHS) is influenced by age, sex, and handedness. Aim: To assess the association of MVIHS with age, sex, and handedness in older adults. Material and Methods: MVIHS was measured using a digital dynamometer in 60 men and 60 women aged 73 ± 6 years. Weight, height and handedness were also r...

Aim: To examine body composition of Chilean powerlifters according to body mass and sex. Methods: Male and female powerlifters were recruited from one national competition. Aside from the official weight categories, males were classified as lightweight, middleweight, and heavyweight classes. Similarly, females were classified as lightweight and a m...

Objective: to analyze the effects of vibration training on fall risk, which implies measurements in walking speed, balance, power and muscle strength, in institutionalized older adults, through a systematic review. Method: a systematic bibliographical search was carried out in PUBMED, one of the largest electronic availability databases in the worl...