Date of Award

5-2018

Document Type

Thesis

Degree Name

Master of Science

Department

Kinesiology

First Advisor

Paul Wright

Second Advisor

Kate Tessmer

Third Advisor

Michael Reese

Abstract

Triphasic training is a method popularized by Cal Dietz (Dietz & Peterson, 2012) which includes three different phases: accumulation, transmutation, and realization. Different goals are set for each phase with power development being the overarching theme. During the accumulation phase, the training block is split into the three muscle actions eccentric, isometric, and concentric. During each phase, one action is the emphasis of the program. The purpose of this study was to examine the effects of the accumulation phase of the triphasic training program on collegiate men's volleyball players I-Repetition Max strength, vertical jump, and isometric force. Additionally, the researcher monitored the maintenance of the triphasic training program after a take-home transition period.

Fourteen (14) athletes on an NCAA Division II Men's Volleyball program from a Midwestern university completed all three testing periods, that included the vertical jump, isometric mid-thigh pull, front squat, and trap bar deadlift. After completing two weeks of eccentric and isometric training, the participants completed the second test. The last test was conducted after the participants completed a five-week take-home program during a holiday break that consisted of complex training.

The results showed significant increases in performance in the front squat, trap bar dead lift, and isometric mid-thigh pull after the two weeks of eccentric and isometric triphasic training. However, there was no change found in the vertical jump during this time. When comparing the second and third test, there was no signjficant drop off during the transition phase. This suggests that eccentric and isometric training for two weeks each will increase an individual's strength, but not power.

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