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Methodological approaches to determine the “U”-pacing strategy in cycling time trial

2017; Taylor & Francis; Volume: 17; Issue: 5 Linguagem: Inglês

10.1080/24748668.2017.1399322

2474-8668

Rafael de Almeida Azevedo, Ramón Cruz, Marcos David Silva‐Cavalcante, Renata Silva, Carlos Rafaell Correia‐Oliveira, P. Couto, Adriano Eduardo Lima‐Silva, Rômulo Bertuzzi,

Muscle activation and electromyography studies

The present study proposed two models (visual and mathematical) to determine the three phases of “U”-pacing profile during a cycling time trial. The reliability of visual model was tested and models were compared. Fifteen cyclists performed a maximal incremental test and two 4-km TT. For the visual model, four experienced evaluators analysed twice the pacing, seven days apart. The mathematical model consisted on the mean of power output during phase 2 (1- until 3 km) plus two standard deviations, to distinguish phase 2 change points between phases 1 (CP1) and 3 (CP2). The CP1 occurred at 419 ± 186 and 415 ± 178 m for visual and mathematical model and CP2 occurred at 3646 ± 228 and 3809 ± 213 m, respectively. There was no difference between models for both CP (p 0.87 and CP2 was ICC >0.96 (p 0.89 (p <0.05). Bland–Altman plots showed agreement between models, most the difference was <5%. The visual and mathematical models are reliable and produce similar values for determining main phases of the “U”-pacing profile during a cycling TT.