Date of Award

Spring 5-8-2026

Document Type

Thesis

Degree Name

Bachelor of Science (BS)

Department

Kinesiology

College

College of Health and Human Performance

First Advisor

Sungwon Chae

Abstract/Description

This study examined the synergistic effects of cluster sets (CS) and individualized accentuated eccentric loading (AEL) on post-activation performance enhancement compared to a traditional method (TRD). Twenty participants (10 females and 10 males) completed four visits: 1) back squat (BS) one-repetition maximum (1RM) testing and jump familiarization, 2) individualized AEL determination, and 3) and 4) two lower-body complex training sessions. Countermovement jump (CMJ) was performed at baseline and 2-, 4-, 6-, 8- and 10-minute after BS at 85% 1RM using CS + AEL or TRD in a randomized, counterbalanced order. CS + AEL incorporated 30-second inter-repetition rests into BS and 10%, 20%, or 30% body mass (BM) dumbbells, with the first or both repetitions, into CMJ depending on individualized method. Jump height (JH) and reactive strength index-modified (RSI-mod) were analyzed using three-way ANCOVA, with baseline as covariates. No significant sex × condition × time point interaction was observed in JH (p = 0.588) and RSI-mod (p = 0.679). However, Hedge’s g effect sizes suggest that CS + AEL showed moderate improvements in JH at 2-, 4-, and/or 6-minute postexercise compared to TRD and respective baseline for both females (g = 0.60–0.75) and males (g = 0.85–0.98). CS + AEL showed moderate improvements in RSI-mod at 4- and 10-minute postexercise compared to respective baseline for females (g = 0.76–0.79) and 6-minute postexercise compared to TRD for males (g = 0.68). These findings suggest CS + AEL may enhance post-activation performance enhancement at early time points for both sexes.

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Available for download on Friday, May 07, 2027

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