Journal
INTERNATIONAL JOURNAL OF SPORTS MEDICINE
Volume 38, Issue 6, Pages 462-467Publisher
GEORG THIEME VERLAG KG
DOI: 10.1055/s-0043-102944
Keywords
exercise testing; anaerobic capacity; training zones; isokinetic
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Research suggests that critical power (CP) can be estimated from a single 3-min bout of all-out cycling. The purpose of this study was to investigate the reliability and validity of the 3-min all-out cycling test when carried out at a constant cadence (isokinetic) and against a fixed resistance (linear). 12 participants completed 8 tests: 1) a ramp test; 2-4) 3 fixed power tests to calculate CP and W' using the 1/time mathematical model; 5-8) four 3-min all-out tests to calculate EP and WEP; 2 isokinetic and 2 linear tests. There was no significant difference between EP-isokinetic and CP (P = 0.377). There were significant differences between EP-linear and CP (P = 0.004), WEP-isokinetic and W' (P < 0.001) and WEP-linear and W' (P < 0.001). The coefficient of variation in EP-isokinetic, EP-linear, WEP-isokinetic and WEP-linear was 1.93, 1.17, 8.44 and 5.39%, respectively. The 3-min all-out isokinetic test provides a reliable estimate of EP and a valid estimate of CP. The 3-min all-out linear test provides a reliable estimate of EP, but not a valid estimate of CP. Furthermore, these results suggest that the 3-min all-out test should not be used to estimate W'.
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