Predicting 1 Repetition Maximum Squat With Peak Force Obtained From Isometric Squat at Multiple Positions.

Tan, WZN and Lum, D. Predicting 1 repetition maximum squat with peak force obtained from isometric squat at multiple positions. J Strength Cond Res 38(9): 1543-1550, 2024-This study investigated whether the use of peak force (PF) obtained from multiple joint positions during isometric squat (IsoSqt) can predict of 1-repetition maximum (1RM) squat with high precision.

Postactivation Performance Enhancement With Maximal Isometric Contraction on Power-Clean Performance Across Multiple Sets.

Purpose: This study investigated the postactivation performance-enhancement effect of maximal voluntary isometric contraction (MVIC) at the starting position on power-clean performance over a series of contrast sets.

Methods: Eighteen male (age: 31 [3.7] y, body mass: 76.

Comparing the Effects of Long-Term vs. Periodic Inclusion of Isometric Strength Training on Strength and Dynamic Performances.

Lum, D, Joseph, R, Ong, KY, Tang, JM, and Suchomel, TJ. Comparing the effects of long-term vs. periodic inclusion of isometric strength training on strength and dynamic performances.

Effects of Performing Isometric Bench Press Training at Single Versus Multiple Joint Positions on Strength and Power Performance.

Unlabelled: Isometric strength training has been reported to benefit various sport-related dynamic performances. However, it is still unknown whether performing isometric strength training at single or multiple joint angles would elicit greater benefit.

Purpose: To compare the effects of isometric bench press performed at single (SIBP) and multiple (MIBP) joint angles on dynamic strength and overhead throwing performance.

Effects of Isometric Strength and Plyometric Training on Running Performance: A Randomized Controlled Study.

The aim of the study was to compare the effects of isometric strength (IST) and plyometric training (PT) on endurance running performance. Twenty-six endurance runners (18 males and 8 females; age 36 ± 6 years, stature 1.69 ± 0.

Comparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristics.

The purpose of the study was to compare the change in dynamic and isometric force-time characteristics after plyometric (PLYO) or isometric strength training (ISO). Twenty-two endurance runners (age = 37 ± 6 years, stature = 1.71 ± 0.

Effectiveness of On-Court Resistive Warm-Ups on Change of Direction Speed and Smash Velocity during a Simulated Badminton Match Play in Well-Trained Players.

In badminton, power production can be enhanced through the fundamental practice of a dynamic warm-up with resistance conditioning activity to induce a post-activation performance enhancement (PAPE) effect. The use of heavy resistance exercise in the form of heavy weights to induce PAPE during competition is not logistically practical in the badminton arena. Thus, there is a need to investigate the use of easily available alternative preconditioning stimuli to induce a similar potentiating effect in badminton-specific performance.

The transfer of dry-land strength & power into thrust in competitive swimming.

The aim was to compare the transfer of dry-land strength and power (S&P) of the shoulder into thrust in front-crawl between swimmers of different competitive levels. Four elite and six sub-elite swimmers were selected to perform a dry-land or an in-water test in random order. The dry-land S&P measurements comprised mean torque, peak torque and mean power of the shoulder rotators of the dominant and non-dominant upper-limbs that were assessed on an isokinetic dynamometer at 90°/s and 180°/s.

Effects of Complex Training on Sprint, Jump, and Change of Direction Ability of Soccer Players: A Systematic Review and Meta-Analysis.

The aim of this meta-analysis was to evaluate the effects of complex training (CT) on sprint, jump, and change of direction (COD) ability among soccer players. After an electronic search, 10 peer-reviewed articles were considered in the meta-analysis. The athletes included in this meta-analysis were amateur to professional level male soccer players (age range, 14-23 years).

Sprint Kayaking Performance Enhancement by Isometric Strength Training Inclusion: A Randomized Controlled Trial.

Performing isometric strength training (IST) can enhance various sports performance. This study compared the effects of including IST on sprint kayaking performance as compared to traditional strength training. Twenty sprint kayaking athletes (age 22 ± 4 year, stature 1.

Relationship Between Isometric Force-Time Characteristics and Sprint Kayaking Performance.

Unlabelled: Force-time characteristics obtained during isometric strength tests are significantly correlated to various sporting movements. However, data on the relationship between isometric force-time characteristics and sprint kayaking performance are lacking in the literature.

Purpose: The purpose of the study was, therefore, to investigate the relationship between sprint kayaking performance with ergometer performance and measures from 3 isometric strength tests: isometric squat, isometric bench press, and isometric prone bench pull.

Arm-pull thrust in human swimming and the effect of post-activation potentiation.

The aim of this study was to analyse the front-crawl arm-pull kinetics and kinematics, comparing it before and after post-activation potentiation (PAP), and the associations between variables describing of the arm-pull kinetics. Twelve male competitive swimmers were randomly assigned to perform two different warm-ups in a crossover manner: (i) non-PAP (control condition); and (ii) PAP (experimental condition). PAP consisted of 2 × 5 arm-pulls with resistance bands by both upper-limbs.

The Relationship between Isometric Force-Time Characteristics and Dynamic Performance: A Systematic Review.

The purpose of this article was to review the data on the relationship between multi-joint isometric strength test (IsoTest) force-time characteristics (peak force, rate of force development and impulse) and dynamic performance that is available in the current literature. Four electronic databases were searched using search terms related to IsoTest. Studies were considered eligible if they were original research studies that investigated the relationships between multi-joint IsoTest and performance of dynamic movements; published in peer-reviewed journals; had participants who were athletes or active individuals who participate in recreational sports or resistance training, with no restriction on sex; and had full text available.

Validity and Reliability of the Isometric Prone Bench Pull Test.

Isometric strength tests are gaining popularity in recent years. However, no study has validated any isometric strength tests to assess upper body pulling ability. The aim of this study was to investigate the validity and reliability of isometric prone bench pull.

Relationship between isometric force-time characteristics and dynamic performance pre- and post-training.

Background: The effect of strength training on the relationship between isometric force-time characteristics with dynamic performances is still unknown. Therefore, the purpose of this study was to investigate if strength training would alter relationship between the force-time characteristics achieved from isometric squat (ISqT) with dynamic performances.

Methods: Six female and 18 male elite floorball athletes (age: 24±3 years; stature: 1.

Effects of Strength Training on Olympic Time-Based Sport Performance: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.

Purpose: To evaluate the effect of strength training on Olympic time-based sports (OTBS) time-trial performance and provide an estimate of the impact of type of strength training, age, training status, and training duration on OTBS time-trial performance.

Methods: A search on 3 electronic databases was conducted. The analysis comprised 32 effects in 28 studies.

Human thrust in aquatic environment: The effect of post-activation potentiation on flutter kick.

Herein, we analyse by experimental techniques the human kicking thrust and measure the effect of a warm-up routine that includes post-activation potentiation (PAP) sets on front-crawl flutter kick thrust, kinematics, and performance. Sixteen male competitive swimmers with 22.13 ± 3.

Effects of intermittent sprint and plyometric training on endurance running performance.

Purpose: The purpose of this study was to compare the effects of intermittent sprint training and plyometric training on endurance running performance.

Methods: Fourteen moderately trained male endurance runners were allocated into either the intermittent sprint training group ( = 7) or the plyometric training group ( = 7). The preliminary tests required subjects to perform a treadmill graded exercise test, a countermovement jump test for peak power measurement, and a 10-km time trial.

Brief Review: Effects of Isometric Strength Training on Strength and Dynamic Performance.

This review used a narrative summary of findings from studies that focused on isometric strength training (IST), covering the training considerations that affect strength adaptations and its effects on sports related dynamic performances. IST has been shown to induce less fatigue and resulted in superior joint angle specific strength than dynamic strength training, and benefited sports related dynamic performances such as running, jumping and cycling. IST may be included into athletes' training regime to avoid getting overly fatigue while still acquiring positive neuromuscular adaptations; to improve the strength at a biomechanically disadvantaged joint position of a specific movement; to improve sports specific movements that require mainly isometric contraction; and when athletes have limited mobility due to injuries.

Effects of Various Warm-Up Protocol on Special Judo Fitness Test Performance.

Lum, D. Effects of various warm-up protocol on special judo fitness test performance. J Strength Cond Res 33(2): 459-465, 2019-The purposed of this study was to compare the effects of postactivation potentiation (PAP) on Special Judo Fitness Test (SJFT) performance using explosive exercises that activates upper and lower limbs muscles.

CYP2D6 genotype and tamoxifen response for breast cancer: a systematic review and meta-analysis.

Objective: To evaluate evidence on the association between CYP2D6 genotype and tamoxifen response through.

Design: Systematic review and meta-analysis of prospective, cross-sectional and case-control studies published to 2012. For each study, relative risks and 95% confidence intervals were extracted and pooled with a fixed and random effects model.

Xenobiotic and folate pathway gene polymorphisms and risk of childhood acute lymphoblastic leukaemia in Javanese children.

Xenobiotic and folate metabolic pathways are important for the maintenance of genetic stability and may influence susceptibility to the development of childhood acute lymphoblastic leukaemia (ALL). In this study, we investigated 10 polymorphisms in 6 genes (GSTM1-present/null, GSTT1-present/null, GSTP1 1578A > G, NQO1 609C > T, MTHFR 677C > T, MTHFR 1298A > C, MTHFD1 1958G > A, 3'-TYMS 1494 6bp-deletion/insertion, 5'-TYMS 28bp-tandem repeats, and SLC19A1 80G > A) in a cohort of 185 Javanese children with ALL and 177 healthy controls. In ALL patients, none of the polymorphisms demonstrated a statistically significant association with ALL after correcting for multiple comparisons.