Purpose: There has been paucity in research investigating the individualization of recovery interval duration during cycling-based high-intensity interval training (HIIT). The main aim of the study was to investigate whether individualizing the duration of the recovery interval based upon the resolution of muscle oxygen consumption would improve the performance during work intervals and the acute physiological response of the HIIT session, when compared with a standardized (2:1 work recovery ratio) approach. Methods: A total of 16 well-trained cyclists (maximal oxygen consumption: 60  mL·kg−1·min−1) completed 6 laboratory visits: (Visit 1) incremental exercise test, (Visit 2) determination of the individualized (IND) recovery duration, using the individuals’ muscle oxygen consumption recovery duration to baseline from a 4- and 8-minute work interval, (Visits 3–6) participants completed a 6 × 4- and a 3 × 8-minute HIIT session twice, using the IND and standardized recovery intervals. Results: Recovery duration had no effect on the percentage of the work intervals spent at >90% and >95% of maximal oxygen consumption, maximal minute power output, and maximal heart rate, during the 6 × 4- and 3 × 8-minute HIIT sessions. Recovery duration had no effect on mean work interval power output, heart rate, oxygen consumption, blood lactate, and rating of perceived exertion. There were no differences in reported session RPE between recovery durations for the 6 × 4- and 3 × 8-minute HIIT sessions. Conclusion: Individualizing HIIT recovery duration based upon the resolution of muscle oxygen consumption to baseline levels does not improve the performance of the work intervals or the acute physiological response of the HIIT session, when compared with standardized recovery duration.
Christopher R.J. Fennell and James G. Hopker
Matheus Hausen, Pedro Paulo Soares, Marcus Paulo Araujo, Débora Esteves, Hilbert Julio, Roberto Tauil, Marcus Junca, Flávia Porto, Emerson Franchini, Craig Alan Bridge, and Jonas Gurgel
. Alexander RP , Mier CM . Intermittent vs continuous graded exercise test for VO 2 max in college soccer athletes . Int J Exerc Sci . 2011 ; 4 ( 3 ): 185 – 191 . 10. Midgley AW , McNaughton LR , Carroll S . Time at VO 2 max during intermittent treadmill running: test protocol dependent or
Bent R. Rønnestad, Tue Rømer, and Joar Hansen
. PubMed ID: 21952633 doi:10.1249/MSS.0b013e3182388684 24. Demarie S , Koralsztein JP , Billat V . Time limit and time at VO 2 max during a continuous and an intermittent run . J Sports Med Phys Fitness . 2000 ; 40 ( 2 ): 96 – 102 . PubMed ID: 11034428 25. Borg GA . Psychophysical bases of