Reliability of a 5 x 6-s maximal cycling repeated-sprint test in trained female team-sport athletes.
The present study examined the reliability of work and power measures during a 5 x 6-s cycle ergometer test of repeated-sprint ability. Nine, well-trained, female soccer players performed five, 5 x 6-s repeated-sprint tests on a front-access cycle ergometer on separate days. Sprints were separated by 24 s of active recovery. Absolute measures of total work done (W (tot)), total peak power (PP(tot)), work done during sprint 1 (W (1)) and peak power output during sprint 1 (PP(1)) were recorded. Decrement scores in work done (W (dec)) and peak power output (PP(dec)), and fatigue indices for work done (FI( W )) and peak power (FI( P )), were calculated. Significant improvements in all of the work and power measures were observed between trial 1 and subsequent trials (P < 0.05), but no significant differences were identified between trials 2, 3, 4 and 5. The same was true for increases in the decrement scores. The coefficient of variation (CV) was established to reflect within-subject reproducibility for each variable. The CV was significantly improved by the third trial for work done (W (tot) CV: trials 1-2 = 5.5%; trials 3-4 = 2.8%), peak power (PP(tot) CV: trials 1-2 = 5.1%; trials 3-4 = 2.7%) and performance decrement scores (P < 0.05). The standard error of measurement (SEM) and intraclass correlation coefficient (ICC) were also calculated for each variable and expressed within 95% confidence intervals. It was concluded that two familiarisation trials are optimal for collecting reliable data from a 5 x 6-s repeated-sprint cycling test. Furthermore, due to the large variation around performance decrement it was suggested that decrement scores ought to be interpreted with caution.
McGawley
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K
Team Sport Research Group, School of Human Movement and Exercise Science, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia. k.mcgawley@brighton.ac.uk
Bishop
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D
D000328:Adult; D000465:Algorithms; D015308:Anaerobic Threshold / Q000502:physiology; D001642:Bicycling / Q000502:physiology*; D003627:Data Interpretation, Statistical; D005080:Exercise Test / Q000379:methods* / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D018763:Muscle Fatigue / Q000502:physiology; D015203:Reproducibility of Results; D012916:Soccer / Q000502:physiology*