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Advisor(s)
Abstract(s)
Introduction: Sprinting contributes to successful performance in the wide range of sporting
activities. It’s known that sprinting speed is defined with the frequency and the length of
strides (Čoh, Tomažin & Rausavljević, 2007). According Bezodias et al. (2008) the frequency
of stride (FS) was a more important contributor to the velocity increase in sprint performance,
however for Mackala (2007) the length of stride (LS) was a more significant variable. The aim
of this study is to determine if different types of heating can interfere with the frequency and
length variability of the stride. Methods: 22 young men participated in this study (age:
19.32±1.43 years; height: 176±67cm; weight: 68.48±9.91kg). The study followed a
randomized protocol and the subjects were submitted to three warm-up protocols: without
warm-up, typical warm-up and warm-up with post-activation potentiation (PAP). Results:
The results reveal a strong correlations between the sprint time of 30m and the frequency of
stride and length of stride. Discussion: Regardless of the type of warm-up, we can observe
that the frequency and length stride are relevant factors that contribute to sprint time
performance. The results corroborated with other studies indicating that maximum speed
results from an optimal ratio between stride frequency and stride length. Conclusion: The
frequency and length of stride were shown to be two influential factors in the sprint time of
30m. We suggest that future studies include exercises on warm-up that stimulate the
frequency and amplitude of stride, in order to verify which of the variables has the greatest
impact on sprint performance.
Description
Keywords
Frequency of stride Length of stride Sprint time