Maximal power output during incremental cycling test is dependent on the curvature constant of the power-time relationship.
The aim of this study was to investigate whether the maximal power output (Pmax) during an incremental test was dependent on the curvature constant (W') of the power-time relationship. Thirty healthy male subjects (maximal oxygen uptake = 3.58 ± 0.40 L·min(-1)) performed a ramp incremental cycling test to determine the maximal oxygen uptake and Pmax, and 4 constant work rate tests to exhaustion to estimate 2 parameters from the modeling of the power-time relationship (i.e., critical power (CP) and W'). Afterwards, the participants were ranked according to their magnitude of W'. The median third was excluded to form a high W' group (HIGH, n = 10), and a low W' group (LOW, n = 10). Maximal oxygen uptake (3.84 ± 0.50 vs. 3.49 ± 0.37 L·min(-1)) and CP (213 ± 22 vs. 200 ± 29 W) were not significantly different between HIGH and LOW, respectively. However, Pmax was significantly greater for the HIGH (337 ± 23 W) than for the LOW (299 ± 40 W). Thus, in physically active individuals with similar aerobic parameters, W' influences the Pmax during incremental testing.
a Physical Effort Laboratory, Sports Center, Federal University of Santa Catarina, Florianópolis, Brazil.
Kristopher Mendes
KM
Souza
a Physical Effort Laboratory, Sports Center, Federal University of Santa Catarina, Florianópolis, Brazil.
Ricardo Dantas
RD
de Lucas
a Physical Effort Laboratory, Sports Center, Federal University of Santa Catarina, Florianópolis, Brazil.
Paulo Cesar
PC
do Nascimento Salvador
a Physical Effort Laboratory, Sports Center, Federal University of Santa Catarina, Florianópolis, Brazil.
Luiz Guilherme Antonacci
LG
Guglielmo
b Human Performance Laboratory, IB - UNESP, Rio Claro, Avenida 24 A, 1515, Bela Vista - CEP 13506-900, São Paulo, Brazil.
Renato Aparecido Corrêa
RA
Caritá
b Human Performance Laboratory, IB - UNESP, Rio Claro, Avenida 24 A, 1515, Bela Vista - CEP 13506-900, São Paulo, Brazil.
Camila Coelho
CC
Greco
b Human Performance Laboratory, IB - UNESP, Rio Claro, Avenida 24 A, 1515, Bela Vista - CEP 13506-900, São Paulo, Brazil.
Benedito Sérgio
BS
Denadai
D000328:Adult; D001642:Bicycling; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test / Q000379:methods*; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D008954:Models, Biological; D009119:Muscle Contraction; D018763:Muscle Fatigue; D053580:Muscle Strength; D018482:Muscle, Skeletal / Q000502:physiology*; D010101:Oxygen Consumption; D011237:Predictive Value of Tests; D013997:Time Factors; D055815:Young Adult
critical power; cycling; cyclisme; endurance; exercise performance; fatigue; performance physique; puissance critique; ramp incremental test; test d’effort progressif