Int J Sports Med 2024; 45(02): 104-109
DOI: 10.1055/a-2155-6813
Training & Testing

Running Functional Threshold versus Critical Power: Same Concept but Different Values

Alberto A Ñancupil-Andrade
1   Department of Health, Universidad de Los Lagos, Puerto Montt, Chile
,
2   Department of Physical Education and Sport, University of Granada, Granada, Spain
,
Alejandro Pérez-Castilla
3   Department of Education, University of Almería, Almería, Spain
,
4   Department of Sport Science, University of Innsbruck, Innsbruck, Austria
,
Felipe García-Pinillos
5   Physical Education, Sports and Recreation, Universidad de La Frontera, Temuco, Chile
› Institutsangaben

Funding Information Ministerio de Ciencia, Tecnología e Innovación — http://dx.doi.org/10.13039/501100003033; PID2020–115600RB-C21 Ministerio de Universidades — http://dx.doi.org/10.13039/501100023561; FPU19/00542
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Abstract

The aims of this study were (i) to estimate the functional threshold power (FTP) and critical power (CP) from single shorter time trials (TTs) (i. e. 10, 20 and 30 minutes) and (ii) to assess their location in the power-duration curve. Fifteen highly trained athletes randomly performed ten TTs (i. e. 1, 2, 3, 4, 5, 10, 20, 30, 50 and 60 minutes). FTP was determined as the mean power output developed in the 60-min TT, while CP was estimated in the running power meter platform according to the manufacturer’s recommendations. The linear regression analysis revealed an acceptable FTP estimate for the 10, 20 and 30-min TTs (SEE≤12.27 W) corresponding to a correction factor of 85, 90 and 95%, respectively. An acceptable CP estimate was only observed for the 20-min TT (SEE=6.67 W) corresponding to a correction factor of 95%. The CP was located at the 30-min power output (1.0 [–5.1 to 7.1] W), which was over FTP (14 [7.0 to 21] W). Therefore, athletes and practitioners concerned with determining FTP and CP through a feasible testing protocol are encouraged to perform a 20-min TT and apply a correction factor of 90 and 95%, respectively.



Publikationsverlauf

Eingereicht: 24. Mai 2023

Angenommen: 13. August 2023

Accepted Manuscript online:
16. August 2023

Artikel online veröffentlicht:
06. Oktober 2023

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