@article {2605,
	title = {Power output and muscle metabolism during and following recovery from 10 and 20 s of maximal sprint exercise in humans},
	journal = {Acta Physiologica Scandinavica},
	volume = {163},
	year = {1998},
	note = {Cited By (since 1996):100Export Date: 9 November 2014},
	month = {1998},
	pages = {261 - 272},
	abstract = {On two separate days eight male subjects performed a 10- or 20-s cycle ergometer sprint (randomized order) followed, after 2 min of recovery, by a 30-s sprint. Muscle biopsies were obtained from the vastus lateralis at rest, immediately after the first sprint and after the 2 min of recovery on both occasions. The anaerobic ATP turnover during the initial 10 s of sprint 1 was 129 {\textpm} 12 mmol kg dry weight-1 and decreased to 63 {\textpm} 10 mmol kg dry weight-1 between the 10th and 20th s of sprint 1. This was a result of a 300\% decrease in the rate of phosphocreatine breakdown and a 35\% decrease in the glycolytic rate. Despite this 51\% reduction in anaerobic ATP turnover, the mean power between 10 and 20 s of sprint 1 was reduced by only 28\%. During the same period, oxygen uptake increased from 1.30 {\textpm} 0.15 to 2.40 {\textpm} 0.23 L min-1, which partially compensated for the decreased anaerobic metabolism. Muscle pH decreased from 7.06 {\textpm} 0.02 at rest to 6.94 {\textpm} 0.02 after 10 s and 6.82 {\textpm} 0.03 after 20 s of sprinting (for all changes P \&lt; 0.01). Muscle pH did not change following a 2-min recovery period after both the 10- and 20-s sprints, but phosphocreatine was resynthesized to 86 {\textpm} 3 and 76 {\textpm} 3\% of the resting value, respectively (n.s. 10- vs. 20-s sprint). Following 2 min of recovery after the 10-s sprint subjects were able to reproduce peak but not mean power. Restoration of both mean and peak power following the 20-s sprint was 88\% of sprint 1, and was lower compared with that after the 10-s sprint (P \&lt; 0.01). Total work during the second 30-s sprint after the 10- and the 20-s sprint was 19.3 {\textpm} 0.6 and 17.8 {\textpm} 0.5 kJ, respectively (P \&lt; 0.01). As oxygen uptake was the same during the 30-s sprints (2.95 {\textpm} 0.15 and 3.02 {\textpm} 0.16 L min-1), and [Phosphocreatine] before the sprint was similar, the lower work may be related to a reduced glycolytic ATP regeneration as a result of the higher muscle acidosis.},
	keywords = {Aerobic metabolism, Anaerobic, Fatigue, Glycolysis, pH, Phosphocreatine, Recovery, Sprinting},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0031866962\&partnerID=40\&md5=3a3607d03e31fe92a149ced034912c99},
	author = {Bogdanis, G.C. and Nevill, M.E. and Lakomy, H.K.A. and Boobis, L.H.}
}
