Publications by authors named "Saman Hadjizadeh Anvar"
Article Synopsis
- - The text discusses how explosive movements in sports challenge the neuromuscular system and how traditional resistance training has mixed effects on athletic performance metrics like speed and jump height.
- - It highlights that both the intent to contract explosively and the specific training movements (like angles and velocity) play significant roles in improving performance through motor unit recruitment and neural adaptations.
- - The review suggests that an optimal training strategy combines heavy loads with explosive intent and lighter plyometric exercises, advocating for a tailored approach to resistance training that emphasizes sport-specific explosive actions.
An extensive number of publications have examined cross-education effects with adults, primarily investigating contralateral homologous (same) muscles. There are far fewer investigations on cross-education effects on contralateral heterologous (different) muscles and age (youth vs adult) and no studies investigating sex differences. Hence, the objective was to compare cross-education in female and male youth and young adults to contralateral homologous (chest press [CP], elbow flexors and extensors, handgrip isometric strength, and shot put) and heterologous (leg press, knee extension isometric strength, and countermovement jump) muscles.
View Article and Find Full Text PDFBackground: Long-term static stretching as well as foam rolling training can increase a joint's range of motion (ROM). However, to date, it is not clear which method is the most effective for increasing ROM.
Objective: The purpose of this systematic review and meta-analysis was to compare the effects of static stretching and foam rolling training on ROM.
The perception of time holds a foundational significance regarding how we elucidate the chronological progression of events. While some studies have examined exercise effects on time perception during exercise periods, there are no studies investigating the effects of exercise fatigue on time perception after an exercise intervention. This study investigated the effects of physical and mental fatigue on time estimates over 30 s immediately post-exercise and 6 min post-test.
View Article and Find Full Text PDFBen Othman, A, Anvar, SH, Aragão-Santos, JC, Behm, DG, and Chaouachi, A. Relative cross-education training effects of male youth exceed male adults. J Strength Cond Res 38(5): 881-890, 2024-Cross-education has been studied extensively with adults, examining the training effects on contralateral homologous muscles.
View Article and Find Full Text PDFBackground: Although stretching can acutely increase joint range of motion (ROM), there are a variety of factors which could influence the extent of stretch-induced flexibility such as participant characteristics, stretching intensities, durations, type (technique), and muscle or joint tested.
Objective: The objective of this systematic review and meta-analysis was to investigate the acute effects of stretching on ROM including moderating variables such as muscles tested, stretch techniques, intensity, sex, and trained state.
Methods: A random-effect meta-analysis was performed from 47 eligible studies (110 effect sizes).
Article Synopsis
- - The meta-analysis reviewed 77 studies to determine which variables, like stretching technique and frequency, most effectively improve joint range of motion (ROM) in healthy individuals.
- - Results showed a moderate overall improvement in ROM with stretch training, with static and proprioceptive neuromuscular facilitation techniques being more effective than ballistic/dynamic methods.
- - Findings indicated that females experienced greater gains in ROM compared to males, but other variables like age and trained state did not show significant differences.
Over the last decade, acute increases in range of motion (ROM) in response to foam rolling (FR) have been frequently reported. Compared to stretching, FR-induced ROM increases were not typically accompanied by a performance (e.g.
View Article and Find Full Text PDFPurpose: Muscle stretching effect on the range of motion (ROM) and force deficit in non-stretched muscle, and the underlying mechanisms, is an ongoing issue. This study aimed to investigate crossover stretching effects and mechanisms on the plantar flexor muscles.
Methods: Fourteen recreationally active females (n = 5) and males (n = 9) performed six sets of 45-s static stretching (SS) (15-s recovery) to the point of discomfort of the dominant leg (DL) plantar flexors or control (345-s rest).
Over the last approximately 20 years, research has reported on performance impairments following prolonged durations of static stretching. This has led to a paradigm shift towards dynamic stretching. There has also been a greater emphasis using foam rollers, vibration devices, and other techniques.
View Article and Find Full Text PDFBackground: Although it is known that resistance training can be as effective as stretch training to increase joint range of motion, to date no comprehensive meta-analysis has investigated the effects of resistance training on range of motion with all its potential affecting variables.
Objective: The objective of this systematic review with meta-analysis was to evaluate the effect of chronic resistance training on range of motion compared either to a control condition or stretch training or to a combination of resistance training and stretch training to stretch training, while assessing moderating variables.
Design: For the main analysis, a random-effect meta-analysis was used and for the subgroup analysis a mixed-effect model was implemented.
The occurrence and mechanisms underlying non-local or crossover muscle fatigue is an ongoing issue. This study aimed to investigate crossover fatigue of the plantar flexor muscles. Sixteen recreationally active males (n = 6) and females (n = 10) visited the laboratory for four sessions and performed a single 5-s pre-test maximal voluntary isometric contraction (MVIC) with each plantar flexors muscle.
View Article and Find Full Text PDFBackground: Stretching a muscle not only increases the extensibility or range of motion (ROM) of the stretched muscle or joint but there is growing evidence of increased ROM of contralateral and other non-local muscles and joints.
Objective: The objective of this meta-analysis was to quantify crossover or non-local changes in passive ROM following an acute bout of unilateral stretching and to examine potential dose-response relations.
Methods: Eleven studies involving 14 independent measures met the inclusion criteria.
Behm, DG, Alizadeh, S, Hadjizadeh Anvar, S, Mahmoud, MMI, Ramsay, E, Hanlon, C, and Cheatham, S. Foam rolling prescription: a clinical commentary. J Strength Cond Res 34(11): 3301-3308, 2020-Although the foam rolling and roller massage literature generally reports acute increases in range of motion (ROM) with either trivial or small performance improvements, there is little information regarding appropriate rolling prescription.
View Article and Find Full Text PDF