Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

Performance and physiological responses during a sprint interval training session: relationships with muscle oxygenation and pulmonary oxygen uptake kinetics

Buchheit, M., Abbiss, C.R., Peiffer, J.J.ORCID: 0000-0002-3331-1177 and Laursen, P.B. (2012) Performance and physiological responses during a sprint interval training session: relationships with muscle oxygenation and pulmonary oxygen uptake kinetics. European Journal of Applied Physiology, 112 (2). pp. 767-779.

Link to Published Version: http://dx.doi.org/10.1007/s00421-011-2021-1
*Subscription may be required

Abstract

The purpose of this study was to examine the cardiorespiratory and muscle oxygenation responses to a sprint interval training (SIT) session, and to assess their relationships with maximal pulmonary O 2 uptake (VO 2pmax), on- and off-VO 2p kinetics and muscle reoxygenation rate (Reoxy rate). Ten male cyclists performed two 6-min moderate-intensity exercises (≈90-95% of lactate threshold power output, Mod), followed 10 min later by a SIT session consisting of 6 × 30-s all out cycling sprints interspersed with 2 min of passive recovery. VO 2p kinetics at Mod onset (VO 2p τon) and cessation (VO 2p τ off) were calculated. Cardiorespiratory variables, blood lactate ([La] b) and muscle oxygenation level of the vastus lateralis (tissue oxygenation index, TOI) were recorded during SIT. Percentage of the decline in power output (%Dec), time spent above 90% of VO 2p max (t > 90% VO 2p max) and Reoxy rate after each sprint were also recorded. Despite a low mean VO 2p (48.0 ± 4.1% of VO 2p max), SIT performance was associated with high peak VO 2p (90.4 ± 2.8% of VO 2p max), muscle deoxygenation (sprint ΔTOI = -27%) and [La] b (15.3 ± 0.7 mmol l -1) levels. Muscle deoxygenation and Reoxy rate increased throughout sprint repetitions (P < 0.001 for both). Except for t > 90% VO 2p max versus VO 2p τ off [r = 0.68 (90% CL, 0.20; 0.90); P = 0.03], there were no significant correlations between any index of aerobic function and either SIT performance or physiological responses [e.g., %Dec vs. VO 2p τ off: r = -0.41 (-0.78; 0.18); P = 0.24]. Present results show that SIT elicits a greater muscle O 2 extraction with successive sprint repetitions, despite the decrease in external power production (%Dec = 21%). Further, our findings obtained in a small and homogenous group indicate that performance and physiological responses to SIT are only slightly influenced by aerobic fitness level in this population.

Item Type: Journal Article
Murdoch Affiliation(s): School of Chiropractic and Sports Science
Publisher: Springer Verlag
Copyright: © 2011 Springer-Verlag
URI: http://researchrepository.murdoch.edu.au/id/eprint/7185
Item Control Page Item Control Page