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The 3-min test does not provide a valid measure of critical power using the SRM isokinetic mode

The 3-min test does not provide a valid measure of critical power using the SRM isokinetic mode

Karsten, B., Jobson, S. A., Hopker, J., Passfield, L. and Beedie, C. (2014) The 3-min test does not provide a valid measure of critical power using the SRM isokinetic mode. International Journal of Sports Medicine, 35 (4). pp. 304-309. ISSN 0172-4622 (Print), 1439-3964 (Online) (doi:10.1055/s-0033-1349093)

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Abstract

Recent datas suggest that the mean power over the final 30 s of a 3-min all-out test is equivalent to Critical Power (CP) using the linear ergometer mode. The purpose of the present study was to identify whether this is also true using an “isokinetic mode”. 13 cyclists performed: 1) a ramp test; 2) three 3-min all-out trials to establish End Power (EP) and work done above EP (WEP); and 3) 3 constant work rate trials to determine CP and the work done above CP ( W ′) using the work-time ( = CP1/ W ′1) and 1/time ( = CP2/ W ′2)models. Coefficient of variation in EP was 4.45 % between trials 1 and 2, and 4.29 % between trials 2 and 3. Limits of Agreement for trials 1–2 and trials 2–3 were − 2 ± 38 W. Significant differences were observed between EP and CP1 ( + 37 W, P < 0.001), between WEP and W′ 1( − 6.2 kJ, P = 0.001), between EP and CP2 ( + 31 W, P < 0.001) and between WEP and W′ 2 ( − 4.2 kJ, P = 0.006). Average SEE values for EP-CP1 and EP-CP2 of 7.1 % and 6.6 % respectively were identified. Data suggest that using an isokinetic mode 3-min all out test, while yielding a reliable measure of EP, does not provide a valid measure of CP.

Item Type: Article
Uncontrolled Keywords: critical intensity, exercise testing, anaerobic work capacity, reliability, validity
Subjects: Q Science > QP Physiology
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Centre for Science and Medicine in Sport and Exercise
Faculty of Engineering & Science > Department of Life & Sports Sciences
Related URLs:
Last Modified: 17 Apr 2017 22:30
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/11596

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