Add like
Add dislike
Add to saved papers

Effects of prior very-heavy intensity exercise on indices of aerobic function and high-intensity exercise tolerance.

A recent bout of high-intensity exercise can alter the balance of aerobic and anaerobic energy provision during subsequent exercise above the lactate threshold (theta(L)). However, it remains uncertain whether such "priming" influences the tolerable duration of subsequent exercise through changes in the parameters of aerobic function [e.g., theta(L), maximum oxygen uptake (Vo(2max))] and/or the hyperbolic power-duration (P-t) relationship [critical power (CP) and the curvature constant (W')]. We therefore studied six men performing cycle ergometry to the limit of tolerance; gas exchange was measured breath-by-breath and arterialized capillary blood [lactate] was measured at designated intervals. On different days, each subject completed 1) an incremental test (15 W/min) for estimation of theta(L) and measurement of the functional gain (DeltaVo(2)/DeltaWR) and Vo(2peak) and 2) four constant-load tests at different work rates (WR) for estimation of CP, W', and Vo(2max). All tests were subsequently repeated with a preceding 6-min supra-CP priming bout and an intervening 2-min 20-W recovery. The hyperbolicity of the P-t relationship was retained postpriming, with no significant difference in CP (241 +/- 39 vs. 242 +/- 36 W, post- vs. prepriming), Vo(2max) (3.97 +/- 0.34 vs. 3.93 +/- 0.38 l/min), DeltaVo(2)/DeltaWR (10.7 +/- 0.3 vs. 11.1 +/- 0.4 ml.min(-1).W(-1)), or the fundamental Vo(2) time constant (25.6 +/- 3.5 vs. 28.3 +/- 5.4 s). W' (10.61 +/- 2.07 vs. 16.13 +/- 2.33 kJ) and the tolerable duration of supra-CP exercise (-33 +/- 11%) were each significantly reduced, despite a less-prominent Vo(2) slow component. These results suggest that, following supra-CP priming, there is either a reduced depletable energy resource or a residual fatigue-metabolite level that leads to the tolerable limit before this resource is fully depleted.

Full text links

We have located links that may give you full text access.
Can't access the paper?
Try logging in through your university/institutional subscription. For a smoother one-click institutional access experience, please use our mobile app.

For the best experience, use the Read mobile app

Mobile app image

Get seemless 1-tap access through your institution/university

For the best experience, use the Read mobile app

All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.

By using this service, you agree to our terms of use and privacy policy.

Your Privacy Choices Toggle icon

You can now claim free CME credits for this literature searchClaim now

Get seemless 1-tap access through your institution/university

For the best experience, use the Read mobile app