Gray, Susan, Vito, Giuseppe De and Nimmo, Myra (2002) Effect of active warm-up on metabolism prior to and during intense dynamic exercise. Medicine and Science in Sport and Exercise, 34 (12). pp. 2091-2096. ISSN 0195-9131Full text not available from this repository. (Request a copy)
Purpose: This study investigated whether active warm-up (AW) would increase muscle acetylcarnitine concentration before exercise, thereby reducing the reliance on nonoxidative ATP production during subsequent high-intensity exercise.
Methods: Six female subjects performed a 30-s sprint at 120% of their maximal power output on an electronically braked cycle ergometer 5 min after undertaking an active warm-up. To exclude any effect of muscle temperature (Tm) on metabolism, AW was compared with control (C), which involved passively heating the muscle to the same temperature as that achieved by active warm-up (37.1 +/- 0.3 vs 37.2 +/- 0.2[degrees]C AW and C, respectively).
Results: Active warm-up significantly increased the concentration of acetylcarnitine from 4.5 +/- 1.5 mmol[middle dot]kg dry muscle (dm)-1 at rest to 9.4 +/- 1.6 mmol[middle dot]kg dm-1 before the onset of exercise. There was no change in acetylcarnitine concentration in C. During exercise the accumulation of muscle lactate was significantly less in AW compared with C (21.9 +/- 3.8 vs 34.3 +/- 2.3 mmol[middle dot]kg dm-1, respectively).
Conclusion: The main finding of this study was that there was less accumulation of blood and muscle lactate during intense dynamic exercise preceded by active warm-up, which could not be accounted for by a difference in Tm between trials immediately before the onset of exercise
|Uncontrolled Keywords:||Active warm-up; Muscle acetylcarnitine concentration; Nonoxidative ATP; Metabolism; Muscle lactate; Intense dynamic exercise|
|University Divisions/Research Centres:||Faculty of Health, Life & Social Sciences > School of Life Sciences|
|Dewey Decimal Subjects:||600 Technology > 610 Medicine & health > 612 Human physiology|
600 Technology > 610 Medicine & health > 611 Human anatomy, cytology & histology
|Library of Congress Subjects:||Q Science > QP Physiology|
|Depositing User:||RAE Import|
|Date Deposited:||24 Jun 2008 17:14|
|Last Modified:||24 Jun 2008 17:14|
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