Effects of priming and pacing strategy on VO2 kinetics and cycling performance
Bailey, Stephen J.
Black, Matthew I.
DiMenna, Fred J.
Jones, Andrew M.
International Journal of Sports Physiology and Performance
Purpose: To assess whether combining prior ‘priming’ exercise with an all-out pacing strategy was more effective at improving O2 uptake (VO2) kinetics and cycling performance than either intervention administered independently. Methods: Nine males completed target-work cycling performance trials using a self-paced or all-out pacing strategy with or without prior severe-intensity (70%Δ) priming exercise. Breath-by-breath pulmonary VO2 and cycling power output were measured during all trials. Results: Compared to the self-paced-unprimed control trial (22 ± 5 s), the VO2 mean response time (MRT) was shorter (VO2 kinetics was faster) with all-out pacing (17 ± 4 s) and priming (17 ± 3 s), with the lowest VO2 MRT observed when all-out pacing and priming were combined (15 ± 4 s) (P<0.05). However, total O2 consumed and end-exercise VO2 were only higher than the control condition in the primed trials (P<0.05). Similarly, cycling performance was improved compared to control (98 ± 11 s) in the self-paced-primed (93 ± 8 s) and all-out-primed (92 ± 8 s) trials (P<0.05), but not the all-out-unprimed trial (97 ± 5 s; P>0.05). Conclusions: These findings suggest that combining an all-out start with severe-intensity priming exercise additively improves the VO2 MRT, but not total O2 consumption and cycling performance since these were improved by a similar magnitude in both primed trials relative to the self-paced-unprimed control condition. Therefore, these results support the use of priming exercise as a pre-competition intervention to improve oxidative metabolism and performance during short-duration high-intensity cycling exercise, independent of the pacing strategy adopted.
Copyright © 2015 Human Kinetics
This is the author accepted manuscript. The final version is available from Human Kinetics via the DOI in this record.