Temporal power of a cycling sprinter: Experiments & effective time theory

Using data recorded on ergocycle and in situ at the National Velodrome of Saint-Quentin-en-Yvelines, either during training sessions or during the 2022 World Championship, we first conduct an experimental study on the decay over time of the power developed by a sprinter. We then develop a theoretical model for the power output based on the definition of an effective time to account for fatigue. Comparisons between the model’s predictions and the experimental data demonstrate a strong agreement across all tested conditions, whether on the ergocycle or in the velodrome.

Methods
The datasets for the ergocycle and track experiments were collected using an instrumented crank that measures applied torque with strain gauges and pedaling cadence with an angle encoder (ergocycle) or a gyroscope (track). The instrumented crank, which enables the measurement of torque and pedaling cadence on the track, received approval from the International Cycling Union (UCI) in 2020 for use in competitions. Consequently, it was employed during the 2022 World Championships to record the data presented in the article regarding the kilometer time trial.

To process the data and compare them with the theoretical model, MATLAB was utilized.