Journal of science and medicine in sport · 2025
The role of propulsive force deterioration in the deceleration phase of elite sprinting.
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Connick Mark J
Аннотация
OBJECTIVES: The deceleration phase of sprinting is associated with a reduced capacity to produce propulsive force. This study aimed to quantify the propulsive force deterioration rate and its relationships with deceleration rate, maximum velocity (vmax), and finish velocity (vfinish) in 100 m, 200 m, and 400 m elite-level sprinters. Specifically, it aimed to quantify how differences in event-specific demands influence these relationships.
DESIGN: Cross-sectional.
METHODS: Publicly available elite-level men and women split times from 180 sprinting performances were used to estimate propulsive force deterioration rate, rate of deceleration, vmax and vfinish and other explanatory variables. These data were analysed using analysis of variance and multivariate regression to determine event-specific differences, associations and interaction effects.
RESULTS: Increasing event distance was associated with smaller propulsive force deterioration rate, lower vmax and lower vfinish (p < 0.05). The propulsive force deterioration rate was significantly and positively associated with deceleration rate and negatively associated with vfinish in all events (p < 0.05). The propulsive force deterioration rate was also significantly and positively associated with vmax in the 200 m and 400 m events (p < 0.05) but not in the 100 m.
CONCLUSIONS: Elite-level 200 m and 400 m sprinters exhibited reduced propulsive force deterioration rates which were associated with lower vmax and greater vfinish. In the 400 m event, these results are evidence of an alternate pacing strategy perhaps to reduce energy consumption from anaerobic metabolism, whereas the 200 m results may indicate the biomechanical demands of curve running.
DESIGN: Cross-sectional.
METHODS: Publicly available elite-level men and women split times from 180 sprinting performances were used to estimate propulsive force deterioration rate, rate of deceleration, vmax and vfinish and other explanatory variables. These data were analysed using analysis of variance and multivariate regression to determine event-specific differences, associations and interaction effects.
RESULTS: Increasing event distance was associated with smaller propulsive force deterioration rate, lower vmax and lower vfinish (p < 0.05). The propulsive force deterioration rate was significantly and positively associated with deceleration rate and negatively associated with vfinish in all events (p < 0.05). The propulsive force deterioration rate was also significantly and positively associated with vmax in the 200 m and 400 m events (p < 0.05) but not in the 100 m.
CONCLUSIONS: Elite-level 200 m and 400 m sprinters exhibited reduced propulsive force deterioration rates which were associated with lower vmax and greater vfinish. In the 400 m event, these results are evidence of an alternate pacing strategy perhaps to reduce energy consumption from anaerobic metabolism, whereas the 200 m results may indicate the biomechanical demands of curve running.