Alterations in energy system contribution following upper body sprint interval training
Purpose:The primary purpose of this study was to examine the influence of different work-to-rest ratios on relative energy system utilization during short-term upper-body sprint interval training (SIT) protocols.
Methods: Forty-two recreationally trained men were randomized into one of three training groups [10 s work bouts with 2 min of rest (10:2, n = 11) or 4 min of rest (10:4, n = 11), or 30 s work bouts with 4 min of rest (30:4, n = 10)] or a control group (CON, n = 10). Participants underwent six training sessions over 2 weeks with 4–6 ‘all-out’ sprints. Participants completed an upper body Wingate test (30 s ‘all-out’ using 0.05 kg kg−1 of the participant’s body mass) pre- and post-intervention from which oxygen consumption and blood lactate were used to estimate oxidative, glycolytic, and adenosine triphosphate-phosphocreatine (ATP-PCr) energy system provisions. An analysis of covariance was performed on all testing measurements collected at post with the associated pre-values used as covariates.
Results: Relative energy contribution (p = 0.026) and energy expenditure (p = 0.019) of the ATP-PCr energy system were greater in 10:4 (49.9%; 62.1 kJ) compared to CON (43.1%; 47.2 kJ) post training. No significant differences were found between groups in glycolytic or oxidative energy contribution over a 30 s upper body Wingate test.
high-intensity interval training, Wingate test, upper body training, performance, energy expenditure, ATP-PCr
La Monica, Michael B., David H. Fukuda, Tristan M. Starling-Smith, Nicolas W. Clark, and Valeria LG Panissa. "Alterations in energy system contribution following upper body sprint interval training." European Journal of Applied Physiology 120, no. 3 (2020): 643-651.
European Journal of Applied Physiology