Kym Williams

Flinders University · School of Education

The purpose of this article is to provide practitioners with a system to categorize and individualize training prescription from sprint force-velocity (F-v) profiles to enhance performance in team and individual sport athletes. Despite F-v variables presenting key information about the underpinning mechanisms contributing to sprint performance, the...

Background Sprint performance in junior Australian football (AF) players has been shown to be a differentiating quality in ability level therefore developing sprint characteristics via sprint-specific training methods is an important aspect of their physical development. Assisted sprint training is one training method used to enhance sprint perform...

The purpose of this study was to investigate differences between sex and positional demands in club-based field hockey players by analyzing vertical force-velocity characteristics. Thirty-three club-based field hockey athletes (16 males - age: 24.8 ± 7.3yrs, body mass: 76.8 ± 8.2kg, height: 1.79 ± 0.05m; 17 females - age: 22.3 ± 4.2yrs, body mass:...

To inform physical preparation strategies in field hockey athletes, this cross-sectional study investigated the transfer of mechanical characteristics in different force-vectors and determined the correlations between vertical and horizontal force-velocity profiles and performance outcomes. Thirty-one club-level field hockey athletes (age: 23.1 ± 4...

Objective: This case study aimed to explore changes to sprint force-velocity characteristics across a periodized training year (45 weeks) and the influence on sprint kinematics and performance in national level 100-meter athletes. Force-velocity characteristics have been shown to differentiate between performance levels in sprint athletes, yet limi...

This study aimed to measure agreement between using Samozino’s method and force plates to determine mean force, velocity, and power during unloaded and loaded barbell and hexbar countermovement jumps. Twenty-one subjects performed countermovement jumps against incremental loads using both loading conditions. Ground reaction force was recorded using...

This investigation sought to quantify the level of measurement agreement in system force, velocity and power values derived across three commonly applied assessment techniques during a countermovement jump (CMJ). Twenty-five male national representative athletes completed three CMJs under unloaded (0%1RM) and loaded (40%1RM) jump conditions. Associ...

The purpose of this investigation was to compare the effects of altering the number of players during 'small sided games' on the possession characteristics within a youth under10 football setting. Two modified 'small sided game' versions of 12 a side and 15 a side in accordance to the Australian Football League (AFL) junior match policy were used t...

Purpose: To establish the influence of athlete-dependent characteristics on the generation and timing of system and individual joint powers during a countermovement jump (CMJ). Methods: Male national representative athletes from Volleyball ([VB] n=7), Basketball ([BB], n=6) and Rugby Union ([RU] n=7) performed a set of three CMJ's at relative ba...

The investigation sought to describe the current practices for monitoring and maximising mechanical power (F • v) in the discipline of strength and conditioning. Thirty professional Strength and Conditioning coaches working within a national institute network agreed to complete a short online survey. Questions were posed in the areas of exercise an...

This study aimed to investigate if hip, knee and ankle peak power is influenced by the relative load lifted, altering the joint and system load-power relationship during a countermovement jump (CMJ). Twenty-Three male national representative athletes (age: 20.3 ± 3.1y, squat 1RM: 133.8 ± 24.8kg) completed three CMJs at relative barbell loads of 0,...

This study determined whether body composition, strength, and power changes that occur during preseason can be maintained during an international rugby sevens season. Fourteen male international rugby sevens players (age 21.4 ± 2.2 years; mean ± SD) were categorized as forward (n 7) or back (n 7), and assessed for height, mass (M), skinfolds (S) (7...

Verbal instructions play a key role in motor learning and performance. Whereas directing one's attention towards bodily movements or muscles (internal focus) tends to hinder performance, instructing persons to focus on the movement outcome, or an external object related to the performed task (external focus) enhances performance. The study's purpos...

The purpose of this investigation was to identify differences in end range of motion (ROM) kinetic and kinematic strategies between highly resistance and vertical jump trained athletes and controls. Weightlifters (WL: n=4), short track speed skaters (STSS: n=5) and non-resistance trained controls (C: n=6) performed six standing vertical squat jumps...