Degree Name

PhD (Doctor of Philosophy)

Program

Sport Physiology and Performance

Date of Award

8-2024

Committee Chair or Co-Chairs

Dr. Michael Stone

Committee Members

Satoshi Mizuguchi, Marco Duca, John Wagle, Andy Fry

Abstract

The purpose of this study was to investigate the chronic effects of accentuated eccentric loading (AEL) paired with cluster sets (CS) on dynamic and maximal strength, the endocrine system, and body composition. Seventeen recreationally active subjects (male = 11, females = 6, age = 23.05 ± 4.07, height = 172.09 ± 9.98, body mass = 81.29 ± 22.18, back squat to body mass ratio = 1.55 ± 0.33, bench press to body mass ratio = 1.06 ± 0.28) participated in one familiarization week, 2 weeks of testing, and 4 weeks of training. A strength-endurance block (4 wks) was used for training in which the target load consisted of 3 sets of 10 repetitions. The AEL group performed 3 sets of 10 repetitions for the squat and bench press using AEL every other repetition (5 AEL repetitions per set). Because of this protocol, CS were also performed as one AEL repetition plus one traditional repetition followed by 15 s rest. Weight releasers were attached during the rest between clusters. Resistance training was performed three days a week, sprint and agility work were performed two days a week. Maximum dynamic strength (1 RM squat, 1RM bench press), isometric maximum strength (Isometric midthigh pull) and rate of force development (RFD) were tested before and after the training protocol. Additionally, Testosterone (T), Cortisol (C), and Creatinine (CREA), fat mass (FM) and fat free mass (FFM) were assessed pre and post-test in 16 of the subjects as blood was unable to be collected from one of the subjects post test. Although maximum strength increased over time (n= 17), no statistically significant differences in strength occurred between the AEL and TRAD protocols after 4 weeks of training. No statistically significant differences in resting blood variables or body composition occurred between the AEL and TRAD protocols after 4 weeks of training.

Document Type

Dissertation - unrestricted

Copyright

Copyright by the authors.

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