Degree Name

PhD (Doctor of Philosophy)

Program

Sport Physiology and Performance

Date of Award

8-2025

Committee Chair or Co-Chairs

Michael Stone

Committee Members

Satoshi Mizuguhci, Daniel Gahreman, Marco Duca

Abstract

This study was designed to compare the effects of two different strength training protocols on sprint and change of direction (COD) performance in recreationally trained athletes. Participants were evaluated on maximal dynamic (1RM squat) and isometric (IMTP) strength, speed (30m sprint), and COD (5-0-5 test). The participants were divided into two groups (Low volume-heavy load group [LV], High volume-moderate load high-intensity endurance (HIE) group [HV]) after initial testing, for a 4-week training intervention using traditional and weightlifting derivative lifts. The training consisted of 5 sessions per week (3 sessions resistance training [RT], each about 40-50 mins; 2 sessions sprint & COD, each about 30 mins), after the 4-week intervention, participants were retested. Data was analyzed using repeated measures ANOVA, and effect sizes were calculated using Cohen’s d. The study showed moderate improvement in sprint performance for both groups (d=0.577, p=0.0015) with no difference between the two. HV had a statistically significant improvement in 1RM (d= 1.065, p=0.01), but both LV and HV exhibited statistically significant improvement in relative strength (respectively [SREL], d=-1.27, -2.528; p=0.004, < 0.0001). COD performance and IMTP peak force (PF) was marginally improved in either group. Concurrently, sprint and resistance training is recommended to improve sprint performance. However, COD does not appear to be affected in the same fashion by relative strength and may have a greater learning adaptation for recreationally trained athletes compared to sprinting.

Document Type

Dissertation - unrestricted

Copyright

Copyright by the authors.

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