Chomentowski, Peter J., III
M.S. Ed. (Master of Education)
Department of Kinesiology and Physical Education
High-intensity interval training (HIIT) is a form of exercise used to counter the effects of obesity. HIIT consists of low volume, but increased intensity in a short period of time followed by a relative recovery period, which can be active or passive. PURPOSE: The purpose of this study is to determine the effects of different recovery modalities and durations between high-intensity interval training on lactate clearance, sprint performance, heart rate, and the rating of perceived exertion. METHODS: Forty students participated in the study [(Age: 21.9 +/- 0.3 years; Height: 172.6 +/- 1.6 cm; Weight: 79.4 +/- 2.4 kg; Body Fat %: 18.1 +/- 1.3 (BodPod)]. Subjects were randomly assigned into recovery conditions (modality x duration) which was one of four groups: active recovery for 10 minutes (AR10), active recovery for 5 minutes (AR5), passive recovery for 10 minutes (PR10), or passive recovery for 5 minutes (PR5). The exercise protocol consisted of 3 total maximal-effort sprints each followed by the assigned group recovery phase. Each sprint trial covered a 75-foot distance between a starting line and wall, in which each subject sprinted down to the wall and back to the starting line a total of 3 times, for a total of 450 feet per sprint trial. Following each sprint trial, sprint time, blood lactate concentration, heart rate, and the rating of perceived exertion were recorded. RESULTS: There was significant main effect on blood lactate concentrations seen from recovery modality across all the trials ( p = .038, eta2 = .088). The mean difference across the trials for blood lactate concentration when comparing the active recovery modality to the passive recovery modality was -1.51 mmol/l ( p = .038, 95% CI [-2.92, -0.86]). There was only a significant interaction effect between the trials and recovery duration on blood lactate concentration (p = .002, eta2 = .118). Only an interaction effect between the trials and recovery duration on the rating of perceived exertion was found (p = .034, eta2 = .065). No main or interaction effects were found for either sprint times or heart rate. CONCLUSION: Active recovery is more beneficial for lactate clearance when compared to passive recovery during high-intensity interval training. The effect of recovery duration on lactate clearance and sprint performance must be further investigated.
Flury, Mark Ian, "The acute effects of active recovery during high-intensity interval training on lactate clearance and sprint performance in college-aged students" (2017). Graduate Research Theses & Dissertations. 5286.
v, 70 pages
Northern Illinois University
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