Int J Sports Med 2015; 36(13): 1063-1068
DOI: 10.1055/s-0035-1549958
Training & Testing
© Georg Thieme Verlag KG Stuttgart · New York

Critical Power in Laboratory and Field Conditions Using Single-visit Maximal Effort Trials

C. Triska
1  Sport and Exercise Sciences, University of Applied Sciences, Wiener Neustadt, Austria
2  Center of Sport Science and University Sport, University of Vienna, Vienna, Austria
,
H. Tschan
2  Center of Sport Science and University Sport, University of Vienna, Vienna, Austria
,
G. Tazreiter
1  Sport and Exercise Sciences, University of Applied Sciences, Wiener Neustadt, Austria
,
A. Nimmerichter
1  Sport and Exercise Sciences, University of Applied Sciences, Wiener Neustadt, Austria
› Author Affiliations
Further Information

Publication History



accepted after revision 14 April 2015

Publication Date:
10 August 2015 (online)

Abstract

To compare critical power (CP) and the maximum work performed above CP (W′) obtained from a single-visit laboratory test with a single-visit field test, 10 trained cyclists (V˙O2max 63.2±5.5 mL·min−1·kg−1) performed a laboratory and a field test. The laboratory test consisted of 3 trials to exhaustion between 2–15 min and the field test comprised 3 maximal efforts of 2, 6 and 12 min, where power output was measured using a mobile power meter. CP and W′ were estimated using 3 mathematical models (hyperbolic, linear work-time, linear power −1/time). The agreement between laboratory and field conditions was assessed with the 95% limits of agreement (LoA). CP was not significantly different between laboratory (280±33 W) and field conditions (281±28 W) (P=0.950). W′ was significantly higher in laboratory (21.6±7.1 kJ) compared to field conditions (16.3±7.4 kJ) (P=0.013). The bias was −2.8±27 W (95% LoA: −55 to 50 W) and 6.4±5.1 kJ (95% LoA: −3.5 to 16.4 kJ) for CP and W′, respectively. No differences between the mathematical models were found for CP and W′ (P=0.054–1.000). Although CP was not significantly different between conditions, a high random variation does not support its interchangeable use. The mathematical model used has no influence on estimates of CP and W′.