Comparison Of Oxygen Consumption In 4-second Sprint Interval Exercise with Varied Intensity And Rest Period

Authors

Remzi Satiroglu, The University of Texas at AustinFollow
Christos Kyrillou, The University of Texas at AustinFollow
Jieting Wang, The University of Texas at AustinFollow
Edward Coyle, The University of Texas at AustinFollow

Abstract

Sprint interval training (SIT) is usually performed at maximal ‘all-out’ intensities, that are 5-8-times higher than the power needed to elicit VO_2peak. However, the %VO_2peak associated with repeated submaximal power sprints (%P_max), particularly when paired with varying rest periods, remains unknown. Investigating the %VO_2peak in repeated submaximal power sprints is pivotal, enabling the personalization of workout routines to specific training goals.

PURPOSE: The aim of this study was to systematically investigate the acute physiological responses induced by three levels of %P_max intensities (50%, 75%, and 100% of P_max) with three varying rest periods (15, 30, and 45-s) between thirty 4-s sprints. METHODS: Nine healthy (25±4.9), recreationally active participants took part in nine trials, performing thirty 4-s sprints during cycling with inertial loading at three different intensities and rest periods, in randomized order. RESULTS: Power outputs varied across differing intensities and rest periods. At 52±0.7 %P_max and 74% ±0.3 %P_max, the average output was constant within the rest periods. However, the ‘all-out’ efforts revealed that 15-s rest elicited a lower (pmax of 88±9.0 %P_max compared to 95±3.9%, and 96±5.7% of P_max for 15 vs. 30, and 45-s of rest (p<0.05). VO₂ varied (p2peak for 15-s rest; 35±5.8%, 45±10.5%, 66±12.2% VO_2peak for 30-s rest; and 28±6.7%, 33±5.7%, 54±9.8% VO_2peak for 45-s rest, corresponding to intensities at 52%, 74%, and 88% of P_max, respectively. Notably, a linear regression model identified the equation for VO₂ (mL/min) = 1088.89 + 28.32(%P_max intensity) - 38.75(rest in s) (R²= 0.91). CONCLUSION: A wide range of VO₂ responses (i.e., 28-84% VO_2peak) can systematically be elicited by varying the intensity and rest period during repeated 4-s sprints cycling using inertial loading, offering valuable insights for designing personalized training regimens.

Recommended Citation

Satiroglu, Remzi; Kyrillou, Christos; Wang, Jieting; and Coyle, Edward (2024) "Comparison Of Oxygen Consumption In 4-second Sprint Interval Exercise with Varied Intensity And Rest Period," International Journal of Exercise Science: Conference Proceedings: Vol. 2: Iss. 16, Article 157.
Available at: https://digitalcommons.wku.edu/ijesab/vol2/iss16/157