Draper, Stephen B and Wood, Dan M and Corbett, Jo and James, David V and Potter, Christopher R (2006) The Effect of Prior Moderate-and Heavy-Intensity Running on the VO 2 Response to Exhaustive Severe-Intensity Running. International Journal of Sports Physiology and Performance, 1 (4). ISSN 1555-0265Full text not available from this repository.
We tested the hypothesis that prior heavy-intensity exercise reduces the difference between asymptotic oxygen uptake (VO(2)) and maximum oxygen uptake (VO(2)max) during exhaustive severe-intensity running lasting approximate to 2 minutes. Ten trained runners each performed 2 ramp tests to determine peak VO(2) (VO(2)peak) and speed at ventilatory threshold. They performed exhaustive square-wave runs lasting approximate to 2 minutes, preceded by either 6 minutes of moderate-intensity running and 6 minutes rest (SEV(MOD)) or 6 minutes of heavy-intensity running and 6 minutes rest (SEV(HEAVY)). Two transitions were completed in each condition. VO(2) was determined breath by breath and averaged across the 2 repeats of each test; for the square-wave test, the averaged VO(2) response was then modeled using a monoexponential function. The amplitude of the VO(2) response to severe-intensity running was not different in the 2 conditions (SEV(MOD) vs SEV(HEAVY); 3925 +/- 442 vs 3997 +/- 430 mL/min, P = .237), nor was the speed of the response (tau; 9.2 +/- 2.1 vs 10.0 +/- 2.1 seconds, P = .177). VO(2)peak from the square-wave tests was below that achieved in the ramp tests (91.0% +/- 3.2% and 92.0% +/- 3.9% VO(2)peak, P < .001). There was no difference in time to exhaustion between conditions (110.2 +/- 9.7 vs 111.0 +/- 15.2 seconds, P = .813). The results show that the primary VO(2) response is unaffected by prior heavy exercise in running performed at intensities at which exhaustion will occur before a slow component emerges.
|Subjects:||R Medicine > RC Internal medicine > RC1200 Sports Medicine|
|Divisions:||Schools and Research Institutes > School of Sport & Exercise > Sport and Exercise|
|Depositing User:||David James|
|Date Deposited:||21 Apr 2014 20:15|
|Last Modified:||05 Sep 2016 08:58|