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Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111
Online ISSN 1827-1928
EXERCISE PHYSIOLOGY AND BIOMECHANICS
Bishop D., Spencer M.
School of Human Movement and Exercise Science University of Western Australia Crawley, WA, Australia
Aim. To examine the importance of peak V.O2 in determining repeated-sprint ability (RSA), we recruited 20 well-trained females (10 team-sport athletes and 10 endurance-trained runners; mean SD peak V.O2: 3.3±0.2 L·min-1) who were homogenous with respect to peak V.O2 (mean difference = 0.05 L·min-1).
Methods. Tests consisted of a RSA cycle test (5×6-s max sprints every 30 s) and a peakV.O2 test. Venous and capillary blood was sampled immediately before and after the 5×6-s cycle test for the determination of hypoxanthine concentration ([Hx]), lactate concentration ([La-]) and pH; blood buffer capacity (ßblood) was also estimated.
Results. The team-sport athletes had significantly higher peak power for the 1st sprint (P1; W·kg-1), total work for 5×6-s sprints (Wtot; J·kg-1) and power decrement across the 5 sprints (Pdec), (p<0.05). There were also significant between-group differences for post-test values of [Hx], [La-] and pH (p<0.05). While there was no significant difference in ßblood between the 2 groups (p=0.10), there was a moderate effect (d=0.77).
Conclusion. These results suggest that factors in addition to peak V.O2 are likely to be important for RSA.