Dissertations and Theses @ UNI


Open Access Thesis


University of Northern Iowa--Track and field; University of Northern Iowa; Periodization training--Iowa--Cedar Falls; Track and field athletes--Iowa--Cedar Falls; Periodization training; Track and field; Track and field athletes; Iowa--Cedar Falls; Academic theses;


The purpose of this study was to examine the effect of three different recovery periods (2, 4 or 6 days) after a high intensity strength training protocol on speed and strength variables in Division I track and field sprinters and jumpers. Methods: Research participants (RP) were assessed in a lower body strength test using a back squat one repetition maximum (lRM). A week of recovery was administered following the lower body strength test. A pre-test was administered to establish baseline values on speed and strength variables. Speed variables included 18.3, 36.6 and 54.9 m sprint times and SPLIT 1 (18.3 - 36.6 m time) and SPLIT 2 (36.6 - 54.9 m time). Strength variables included reactive strength index (RSI) and speed-strength. RSI was calculated as the ratio between flight time (FT) and contact time (CT) during a 45 cm drop jump. Speedstrength was measured as the mean power output during loaded jump squats with 10 (JSl0) and 30% (JS30) of the lRM. Following the pre-test, three post-tests following 2, 4 or 6 days of recovery (randomly assigned). A multivariate repeated measures ANO VA was used to determine if there was an effect by any of the length of recoveries on any of the dependent variables. Separate repeated measures ANOVA and dependent t-tests were used for post hoc analyses. An alpha value of p<0.05 was used for all statistical tests in this study. Results: Post-hoc analysis determined a significant recovery effect on FT, RSI and JS 10. Results paired t-tests for: (a) FT showed significantly greater values in 2-day and 4-day recovery than pre-test; (b) RSI showed significantly greater values in 2-day and 6-day recovery than pre-test; and ( c) JS 10 significantly greater values in 2, 4, and 6- day recovery than pre-test.

Year of Submission


Degree Name

Master of Arts


School of Health, Physical Education, and Leisure Services

First Advisor

Robin Lund

Second Advisor

Forrest Dolgener

Third Advisor

Kevin Finn


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Date Original


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