ORCID

0000-0002-2636-4318

Keywords

load-velocity relationship; dual-task; task interference; dehydration; performance; power

Subject Categories

Biomechanics | Exercise Science | Kinesiology

Abstract

Dynamic whole-body pressing movements are an imperative aspect of various sport and occupational settings, requiring motor coordination to kinetically sequence from lower- to upper-extremities. Recently, exercises such as the jammer arm punch press (JPP) have increased in popularity, promoted as an exercise to improve strength and force transfer. While the JPP has observed increased practical utility, its use in research is limited potentially due to difficulties with quantifying exercise intensity. One method to quantify exercise intensity is the assessment of velocity, serving as the basis for velocity-based training. For optimization, this strategy requires an understanding of velocity ranges and their association with exercise loads. While training for strength or power may be a critical component for improved athletic capabilities, live-action settings often involve perceptual-cognitive loads requiring individuals to perceive and respond to an external stimulus. Therefore, incorporating cognitive stimuli into training and testing may better reflect actual demands. However, within these settings, strength, motor coordination, and cognitive function may be affected by exercise-induced fatigue and dehydration. This dissertation aimed to 1) assess the test-retest reliability of load-velocity profiles for the JPP, 2) identify the potential impacts of visual processing and high-intensity intermittent exercise (HIIE) on press performance, and 3) identify the potential impact of passive dehydration. The first investigation demonstrated the JPP load-velocity profile assessment to result in moderate-to-good test-retest reliability. The second investigation indicated increased complexity for visual processing tasks to delay reaction time but not influence movement velocity. While HIIE may invoke a decrease in peak velocity, reaction time was unaffected. Lastly, the final investigation demonstrated dehydration to negate improvements in pressing velocity observed from baseline to post-testing. Additionally, the non dominant arm may be most sensitive to the impact of dehydration on reaction time during a complex visual processing task.

Completion Date

2026

Semester

Summer

Committee Chair

Fukuda, David

Degree

Doctor of Philosophy (Ph.D.)

College

College of Health Professions and Sciences

Department

Kinesiology

Format

PDF

Document Type

Dissertation

Language

English

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