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Comparison of inter-trial recovery times for the determination of critical power and W' in cycling

Comparison of inter-trial recovery times for the determination of critical power and W' in cycling

Karsten, Bettina, Hopker, James, Jobson, Simon, Petrigna, Luca, Klose, Andreas and Beedie, Christopher (2016) Comparison of inter-trial recovery times for the determination of critical power and W' in cycling. Journal of Sports Sciences, 35 (14). pp. 1420-1425. ISSN 0264-0414 (Print), 1466-447X (Online) (doi:10.1080/02640414.2016.1215500)

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Abstract

Critical Power (CP) and W' are often determined using multi-day testing protocols. To investigate this cumbersome testing method, the purpose of this study was to compare the differences between the conventional use of a 24 h inter-trial recovery time with those of 3 h and 30 min for the determination of CP and W'. Methods: Nine moderately trained cyclists performed an incremental test to exhaustion to establish the power output associated with the maximum oxygen uptake (p max), and three protocols requiring time-to-exhaustion trials at a constant work-rate performed at 80%, 100% and 105% of p max. Design: Protocol A utilised 24 h inter-trial recovery (CP24/W'24), protocol B utilised 3 h inter-trial recovery (CP3/W'3), and protocol C used 30 min inter-trial recovery period (CP0.5/W'0.5). CP and W were calculated using the inverse time (1/t) versus power (P) relation (P = W'(1/t) + CP). Results: 95% Limits of Agreement between protocol A and B were -9 to 15 W; -7.4 to 7.8 kJ (CP/W') and between protocol A and protocol C they were -27 to 22 W; -7.2 to 15.1 kJ (CP/W'). Compared to criterion protocol A, the average prediction error of protocol B was 2.5% (CP) and 25.6% (W'), whilst for protocol C it was 3.7% (CP) and 32.9% (W'). Conclusion: 3 h and 30 min inter-trial recovery time protocols provide valid methods of determining CP but not W' in cycling.

Item Type: Article
Uncontrolled Keywords: Critical intensity; Power-duration relationship, Exercise testing; Anaerobic work capacity; Validity
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure
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
Last Modified: 18 Feb 2018 01:38
Selected for GREAT 2016: None
Selected for GREAT 2017: GREAT a
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/15654

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