Abstract
This study was aimed at analyzing the cadence (Cadmax) and the peak vertical ground reaction force (Fymax) during stationary running sprint on dry land and at hip and chest level of water
immersion. We hypothesized that both Fymax and Cadmax depend on the level of immersion and that differences in Cadmax between immersions do not affect Fymax during stationary sprint. 32 subjects performed the exercise at maximum cadence at
each immersion level and data were collected with force plates. The results show that
Cadmax and Fymax decrease 17 and 58% from dry land to chest immersion respectively, with no effect
of cadence on Fymax. While previous studies have shown similar neuromuscular responses between aquatic
and on land stationary sprint, our results emphasize the differences in Fymax between environments and levels of immersion. Additionally, the characteristics of
this exercise permit maximum movement speed in water to be close to the maximum speed
on dry land. The valuable combination of reduced risk of orthopedic trauma with similar
neuromuscular responses is provided by the stationary sprint exercise in water. The
results of this study support the rationale behind the prescription of stationary
sprinting in sports training sessions as well as rehabilitation programs.
Key words
stationary sprint - aquatic exercises - ground reaction forces - rehabilitation