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Influence of pacing strategy on O2 uptake and exercise tolerance.
- Source :
- Scandinavian Journal of Medicine & Science in Sports; Oct2008, Vol. 18 Issue 5, p615-626, 12p, 2 Diagrams, 1 Chart, 4 Graphs
- Publication Year :
- 2008
-
Abstract
- Seven male subjects completed cycle exercise bouts to the limit of tolerance on three occasions: (1) at a constant work rate (340±57 W; even-pace strategy; ES); (2) at a work rate that was initially 10% lower than that in the ES trial but which then increased with time such that it was 10% above that in the ES trial after 120 s of exercise (slow-start strategy; SS); and, (3) at a work rate that was initially 10% higher than that in the ES trial but which then decreased with time such that it was 10% below that in the ES trial after 120 s of exercise (fast-start strategy; FS). The expected time to exhaustion predicted from the pre-established power–time relationship was 120 s in all three conditions. However, the time to exhaustion was significantly greater ( P<0.05) for the FS (174±56 s) compared with the ES (128±21 s) and SS (128±30 s) conditions. In the FS condition, &Vdot;O<subscript>2</subscript> increased more rapidly toward its peak such that the total O<subscript>2</subscript> consumed in the first 120 s of exercise was greater (ES: 5.15±0.78; SS: 5.07±0.83; FS: 5.36±0.84 L; P<0.05 for FS vs ES and SS). These results suggest that a fast-start pacing strategy might enhance exercise tolerance by increasing the oxidative contribution to energy turnover and hence “sparing” some of the finite anaerobic capacity across the transition to high-intensity exercise. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09057188
- Volume :
- 18
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Scandinavian Journal of Medicine & Science in Sports
- Publication Type :
- Academic Journal
- Accession number :
- 34375991
- Full Text :
- https://doi.org/10.1111/j.1600-0838.2007.00725.x