Imbach Frank, Candau Robin, Chailan Romain, Perrey Stephane
Seenovate, 34000 Montpellier, France.
INRAe-DMeM, Univ Montpellier, 34000 Montpellier, France.
Sports (Basel). 2020 Jul 20;8(7):103. doi: 10.3390/sports8070103.
This study assessed the Stryd running power meter validity at sub-maximal speeds (8 to 19 km/h). Six recreational runners performed an incremental indoor running test. Power output (PO), ground contact time (GCT) and leg spring stiffness (LSS) were compared to reference measures recorded by portable metabolic analyser, force platforms and motion capture system. A Bayesian framework was conducted for systems validity and comparisons. We observed strong and positive linear relationships between Stryd PO and oxygen consumption ( R 2 = 0.82 , B F 10 > 100 ), and between Stryd PO and external mechanical power ( R 2 = 0.88 , B F 10 > 100 ). Stryd power meter underestimated PO ( B F 10 > 100 ) whereas GCT and LSS values did not show any significant differences with the reference measures ( B F 10 = 0.008 , B F 10 = 0.007 , respectively). We conclude that the Stryd power meter provides valid measures of GCT and LSS but underestimates the absolute values of PO.
本研究评估了Stryd跑步功率计在亚最大速度（8至19公里/小时）下的有效性。六名休闲跑步者进行了递增式室内跑步测试。将功率输出（PO）、地面接触时间（GCT）和腿部弹簧刚度（LSS）与便携式代谢分析仪、测力平台和动作捕捉系统记录的参考测量值进行比较。采用贝叶斯框架进行系统有效性评估和比较。我们观察到Stryd PO与耗氧量之间存在强正线性关系（R² = 0.82，BF₁₀ > 100），以及Stryd PO与外部机械功率之间存在强正线性关系（R² = 0.88，BF₁₀ > 100）。Stryd功率计低估了PO（BF₁₀ > 100），而GCT和LSS值与参考测量值相比未显示出任何显著差异（分别为BF₁₀ = 0.008，BF₁₀ = 0.007）。我们得出结论，Stryd功率计能提供有效的GCT和LSS测量值，但低估了PO的绝对值。
