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A Six Week Modified Sprint Interval Training Program Incorporating Extended Exercise Bouts Does Not Increase Maximal Cardiac Output, Alan R. Smith
A Six Week Modified Sprint Interval Training Program Incorporating Extended Exercise Bouts Does Not Increase Maximal Cardiac Output, Alan R. Smith
Electronic Thesis and Dissertation Repository
Sprint interval training (SIT) improves maximal oxygen uptake (V̇O2max) and exercise performance but not maximal cardiac output (Q̇max). The brevity of typical SIT bouts (30-seconds) might hinder improvements in Q̇max. The purpose of this study was to determine whether extended duration SIT (up to 45 second bouts) improves Q̇max. Pre-/Post-SIT (or control) V̇O2max, Q̇max, maximum stroke volume (SVmax), maximum heart rate, arterial-mixed venous oxygen difference, and 5-minute run distance were measured. SIT progressed from 4x30s to 7x45s “all-out” efforts (4 min recovery) over 6 wk (3x/wk) …