Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
from September 2014
©Journal of Sports Science and Medicine (2014) 13, 393 - 396

Research article
Moderate Recovery Unnecessary to Sustain High Stroke Volume during Interval Training. A Brief Report
Jamie Stanley1,2, , Martin Buchheit3
Author Information
1 Centre of Excellence for Applied Sport Science Research, Queensland Academy of Sport, Brisbane, Australia
2 The University of Queensland, School of Human Movement Studies, Brisbane, Australia
3 Sport Science Unit, Myorobie Association, Montvalezan, France

Jamie Stanley
✉ School of Human Movement Studies, The University of Queensland, Brisbane, Queensland 4072, Australia
Publish Date
Received: 04-12-2013
Accepted: 22-01-2014
Published (online): 01-05-2014
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It has been suggested that the time spent at a high stroke volume (SV) is important for improving maximal cardiac function. The aim of this study was to examine the effect of recovery intensity on cardiovascular parameters during a typical high-intensity interval training (HIIT) session in fourteen well-trained cyclists. Oxygen consumption (VO2), heart rate (HR), SV, cardiac output (Qc), and oxygenation of vastus lateralis (TSI) were measured during a HIIT (3×3-min work period, 2 min of recovery) session on two occasions. VO2, HR and Qc were largely higher during moderate-intensity (60%) compared with low-intensity (30%) (VO2, effect size; ES = +2.6; HR, ES = +2.8; Qc, ES = +2.2) and passive (HR, ES = +2.2; Qc, ES = +1.7) recovery. By contrast, there was no clear difference in SV between the three recovery conditions, with the SV during the two active recovery periods not being substantially different than during exercise (60%, ES = −0.1; 30%, ES = −0.2). To conclude, moderate-intensity recovery may not be required to maintain a high SV during HIIT.

Key words: High-intensity interval training, cardiac output, cardiac function, arteriovenous oxygen difference

           Key Points
  • Moderate-intensity recovery periods may not be necessary to maintain high stroke volume during the exercise intervals of HIIT.
  • Stroke volume did not surpass the levels attained during the exercise intervals during the recovery periods of HIIT.
  • The practical implication of these finding is that reducing the intensity of the recovery period during a HIIT protocol may prolong the time to exhaustion, potentially allowing completion of additional high-intensity intervals increasing the time accumulated at maximal cardiac output.
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