Purpose

Force-velocity-power (F-v-P) profiling can illustrate an individual’s sprinting capabilities, but no study has explored the effect of different running surfaces on F-v-P outcomes.

Method

Twelve elite youth football players (age 16.3 ± 0.5 years, mass 67.3 ± 5.4 kg, height 176.2 ± 4.6 cm) performed two 30 m sprints on concrete and artificial turf in a randomised order on two testing days. Differences between surfaces were determined using repeated-measures ANOVA (P < 0.05), whilst the coefficient of variation (CV), smallest worthwhile change and standard error of measurement were calculated to quantify reliability.

Results

No significant differences were found between surfaces over the average of two days. High reliability was evident for 30 m sprint time, theoretical maximum horizontal velocity and ratio of force on both surfaces (CV≤∼5%), while the remaining outputs were not reliable (CV >10%).

Conclusion

These findings show that F-v-P profiling does not differ between concrete and artificial turf. However, higher variability on the more unfamiliar concrete surface suggests that the testing surface should match the playing surface. Since the standard error of measurement is larger than the smallest worthwhile change, the ability of this method to monitor seasonal changes may be limited in youth elite soccer players.

中文翻译：

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人造草皮和混凝土之间的冲刺性能和力速曲线没有差异

目的

力量-速度-力量（FvP）配置文件可以说明个人的冲刺能力，但没有研究探讨不同跑步表面对FvP结局的影响。

方法

十二名精英青年足球运动员（年龄16.3±0.5岁，质量67.3±5.4公斤，身高176.2±4.6厘米）在两个测试日内以随机顺序在混凝土和人造草皮上进行了两次30 m短跑。使用重复测量ANOVA（P <0.05）确定表面之间的差异，同时计算变异系数（CV），最小值得变化和测量标准误差以量化可靠性。

结果

在平均两天的时间内，表面之间没有发现显着差异。在30 m的冲刺时间，理论最大水平速度和两个表面上的力比（CV≤〜5％）时，都具有很高的可靠性，而其余输出则不可靠（CV> 10％）。

结论

这些发现表明，FvP配置文件在混凝土草皮和人造草皮之间没有区别。但是，在不熟悉的混凝土表面上的可变性较高，表明测试表面应与游戏表面匹配。由于标准的测量误差大于最小的有意义的变化，因此，这种方法监视季节性变化的能力可能会在青年精英足球运动员中受到限制。