Objective: A V˙O2 slow component V˙O2 SC typically occurs during continuous, constant work rate exercises conducted at both intense and maximal intensities. The extent to which V˙O2 SC also develops during intermittent exercises in field condition warrants investigations. This study aimed to test the occurrence of a V˙O2 SC during a field-based intermittent exercise performed at an intensity that elicits V˙O2peak . Material and methods: For this purpose, ten male tennis players performed two intermittent field exercises that mimic several aspects of tennis activity: an incremental test to determine their peak rate of oxygen consumption, and a discontinuous, constant work rate exercise (DCWR) conducted at V˙O2peak intensity until exhaustion. Cardio-respiratory variables were measured breath-by-breath using a portable device. Results: The coefficients of determination of the V˙O2 kinetics models were 0.74 ± 0.18 (P < 0.001) and 0.40 ± 0.16 (P < 0.001) for the incremental test and DCWR, respectively. During the incremental test, an extra V˙O2 was detected above a threshold intensity corresponding to 86 ± 6% of V˙O2peak . During DCWR, the occurrence of the V˙O2 SC was significant for 6 subjects, with a magnitude of 4.0 ± 3.3 mL.min−1.kg−1 representing 6.0 ± 3.2% of the total V˙O2 response. Conclusion: This study showed that a mathematical model used to describe V˙O2 response to an intermittent exercise is appropriate and a V˙O2 SC was detected for the majority of the participants during intermittent exercises that elicit V˙O2peak .
|Translated title of the contribution||Occurrence of a V˙O2 slow component during intermittent exercises performed at V˙O2peak|
|Journal||Science and Sports|
|Publication status||Published - 1 Feb 2018|