Sports Sciences Commons^™

The Role Of Rate Of Force Development On Vertical Jump Performance, Christopher Mclellan, Dale Lovell, Gregory Gass

Chris McLellan

The purpose of this study was to examine a) the relationship between rate of force development (RFD) and vertical jump (VJ) performance during a counter movement jump (CMJ), and b) the reliability of RFD recorded during the CMJ and squat jump (SJ) forms of the VJ. Twenty-three physically active men aged 23 ± 3.9 years participated in the study. Subjects completed 3 unloaded CMJ and 3 unloaded SJ in random order on a force plate. The RFD was measured during CMJ and SJ movements with vertical jump displacement (VJD) measured simultaneously during the CMJ only. Subjects incorporated arm swing to …

Effects Of Two Contrast Training Programs On Jump Performance In Rugby Union Players During A Competition Phase, Christos K. Argus, Nicholas D. Gill, Justin W. L. Keogh, Michael R. Mcguigan, Will G. Hopkins

Nicholas J Gill

Purpose: There is little literature comparing contrast training programs typically performed by team-sport athletes within a competitive phase. We compared the effects of two contrast training programs on a range of measures in high-level rugby union players during the competition season.Methods: The programs consisted of a higher volume-load (strength-power) or lower volume-load (speed-power) resistance training; each included a tapering of loading (higher force early in the week, higher velocity later in the week) and was performed twice a week for 4 wk. Eighteen players were assessed for peak power during a bodyweight countermovement jump (BWCMJ), bodyweight squat jump (BWSJ), 50 …

Laboratory And Field-Based Correlates Of Off-Road Cycling Performance, Joshua Adams

Boise State University Theses and Dissertations

The aims of this study were to identify physiologic characteristics among trained off-road cyclists and correlate them with a field-based time trial to determine predictors of live performance. Fourteen trained male off-road cyclists were recruited for this study, and measured for maximum aerobic capacity (VO_2max), peak aerobic power (W_peak), maximum anaerobic power (W_max), time trial performance (sec), and climbing ability (vertical feet per second – VFS). VO_2max and W_peak were measured during an incremental cycling test to exhaustion, W_max was measured during a 30-second Wingate test and time trial, and VFS …

Sources Of Variability In Iso-Inertial Jump Assessments, Kristie-Lee Taylor, John Cronin, Nicholas Gill, Dale Chapman, Jeremy Sheppard

Nicholas J Gill

Purpose: This investigation aimed to quantify the typical variation for kinetic and kinematic variables measured during loaded jump squats. Methods: Thirteen professional athletes performed six maximal effort countermovement jumps on fouroccasions. Testing occurred over 2 d, twice per day (8 AM and 2 PM) separated by 7 d, with the same procedures replicated on each occasion. Jump height, peak power (PP), relative peak power (RPP), mean power (MP), peak velocity (PV), peak force (PF), mean force (MF), and peak rate of force development (RFD) measurements were obtained from a linear optical encoder attached to a 40 kg barbell. Results: A …

Comparing Thigh Muscle Cross-Sectional Area And Squat Strength Among National Class Olympic Weightlifters, Power Lifters, And Bodybuilders, James J. Di Naso, Brian L. Pritschet, John D. Emmett, Jill W. Owen, Jeffrey Willardson, Travis W. Beck, Jason M. Defreitas, Fabio E. Fontana

Faculty Research and Creative Activity

Few studies have compared anthropometric characteristics among national class athletes from different resistance training disciplines, such as Olympic Weightlifting (OL), Power Lifting (PL), and Bodybuilding (BB). Objective: The purpose of the current study was to determine if significant differences exist in the relationship between thigh muscle cross-sectional area and back squat strength among national class athletes from the sports of OL, PL, and BB. Methods: Fifteen national class athletes were assessed for back squat strength, mid-thigh circumference, and mid-thigh skinfold from which total thigh cross-sectional was estimated. A series of One-Way ANOVAs and Pearson Product Moment Correlations were used to …

Comparing Thigh Muscle Cross-Sectional Area And Squat Strength Among National Class Olympic Weightlifters, Power Lifters, And Bodybuilders, James J. Di Naso, Brian L. Pritschet, John D. Emmett, Jill W. Owen, Jeffrey Willardson, Travis W. Beck, Jason M. Defreitas, Fabio E. Fontana

Jeffrey Willardson

Few studies have compared anthropometric characteristics among national class athletes from different resistance training disciplines, such as Olympic Weightlifting (OL), Power Lifting (PL), and Bodybuilding (BB). Objective: The purpose of the current study was to determine if significant differences exist in the relationship between thigh muscle cross-sectional area and back squat strength among national class athletes from the sports of OL, PL, and BB. Methods: Fifteen national class athletes were assessed for back squat strength, mid-thigh circumference, and mid-thigh skinfold from which total thigh cross-sectional was estimated. A series of One-Way ANOVAs and Pearson Product Moment Correlations were used to …

The Effect Of Different Set-Repetition Protocols On Squat Technique In Resistance Trained Individuals, Ashley Pandit

Master's Theses

The effect of different set-repetition protocols on squat technique in resistance trained individuals.

Pandit, AL, Kraemer, WJ, Hooper, DR.

Purpose: The purpose of this investigation is to determine whether or not the increase in repetitions within a set will change the technique of the exercise, and how repetition number in a set affects exercise technique in resistance trained individuals in three different set-repetition protocols equated by total volume.

Methods: 10 men (24.3 ± 2.8 yrs; 179.7 ± 5.7 cm; 85.5 ± 12.5 kg) and 10 women (23.9 ± 2.4 yrs; 166.2 ± 9.1 cm; 66.8 ± 8.4 kg) were the …

A Comparison Of Three Bicycle Pedal Types And Power Output, Brandon Kuhn

Master's Theses

The purpose of this study was to examine the power output over a 30-second maximum effort bicycle sprint with three different pedal types; clipless, toe-strap, and flat. The participants for this investigation were eight (7 males and 1 female) mountain bikers with ages between 20 and 55 ( Age = 40) from the Central Kansas Mountain Bike Club. Each participant was required to provide his or her own bicycle and the researchers provided the training stand, Saris CycleOps PowerTap rear wheel, and Garmin Edge 500 cycling computer used for data collection. Testing procedure consisted of a warmup, 30- second maximal …

Effects Of Two Contrast Training Programs On Jump Performance In Rugby Union Players During A Competition Phase, Christos K. Argus, Nicholas D. Gill, Justin W. L. Keogh, Michael R. Mcguigan, Will G. Hopkins

Justin Keogh

Purpose: There is little literature comparing contrast training programs typically performed by team-sport athletes within a competitive phase. We compared the effects of two contrast training programs on a range of measures in high-level rugby union players during the competition season.

Methods: The programs consisted of a higher volume-load (strength-power) or lower volume-load (speed-power) resistance training; each included a tapering of loading (higher force early in the week, higher velocity later in the week) and was performed twice a week for 4 wk. Eighteen players were assessed for peak power during a bodyweight countermovement jump (BWCMJ), bodyweight squat …

Anthropometric Characteristics, Upper-Body Strength, And Sprint Paddling Performance In Competitive Surfers, Jeremy Sheppard, Mark Osborne, Dale Chapman, Mark Andrews

Research outputs 2012

The present study examined the potential differences in anthropometric characteristics, upper-body strength, and sprint paddling performance between youth and senior competitive surfers. Twenty competitive male surfers (19.1±6.8 years, 168.2±11.3 cm, 61.7±13.6 kg) were assessed for stature, mass, arm-span, ∑ 7 site skinfold thickness, Lean-Mass Ratio (LMR, ∑ 7 site skinfold/kg body-mass), pronated pull-up 1 repetition maximum (1 RM) and sprint paddling performance from a stationary start to 15 m. Independent t-tests were used to compare potential differences between youth (n:10) and senior group (n:10) of competitive surfers, with Cohen’s Effect Size (d) applied to reflect the magnitude of any differences …

Effects Of Two Contrast Training Programs On Jump Performance In Rugby Union Players During A Competition Phase, C K Argus, N D Gill, J W Keogh, Michael Mcguigan, W G Hopkins

Research outputs 2012

Purpose: There is little literature comparing contrast training programs typically performed by team-sport athletes within a competitive phase. We compared the effects of two contrast training programs on a range of measures in high-level rugby union players during the competition season. Methods: The programs consisted of a higher volume-load (strength-power) or lower volume-load (speed-power) resistance training; each included a tapering of loading (higher force early in the week, higher velocity later in the week) and was performed twice a week for 4 wk. Eighteen players were assessed for peak power during a bodyweight countermovement jump (BWCMJ), bodyweight squat jump (BWSJ), …

Monitoring Neuromuscular Fatigue In High Performance Athletes, Kristie-Lee Taylor

Theses: Doctorates and Masters

With improving professionalism of sports around the world, the volume and frequency of training required for competitive performances at the elite level has increased concurrently. With this amplification in training load comes an increased need to closely monitor the associated fatigue responses, since maximising the adaptive response to training is also reliant on avoiding the negative consequences of excessive fatigue. The rationale for the experimental chapters in this thesis was established after considering survey responses regarding current best practice for monitoring fatigue in high performance sporting environments (Chapter 3). On the basis of the results, vertical jump assessments were selected …