Department of Athletic Performance, National Taiwan Normal University, Taipei 106, Taiwan.
Office of Physical Education, National Pingtung University of Science and Technology, Pingtung 912, Taiwan.
Sensors (Basel). 2021 Sep 12;21(18):6117. doi: 10.3390/s21186117.
The purpose of this study was to evaluate the validity and reliability of a tire pressure sensor (TPS) cycling power meter against a gold standard (SRM) during indoor cycling. Twelve recreationally active participants completed eight trials of 90 s of cycling at different pedaling and gearing combinations on an indoor hybrid roller. Power output (PO) was simultaneously calculated via TPS and SRM. The analysis compared the paired 1 s PO and 1 min average PO per trial between devices. Agreement was assessed by correlation, linear regression, inferential statistics, effect size, and Bland-Altman LoA. Reliability was assessed by ICC and CV comparison. TPS showed near-perfect correlation with SRM in 1 s ( = 0.97, < 0.001) and 1-min data ( = 0.99, < 0.001). Differences in paired 1 s data were statistically significant ( = 0.04), but of a trivial magnitude ( = 0.05). There was no significant main effect for device (F(1,9) = 0.05, = 0.83, ηp2 = 0.97) in 1 min data and no statistical differences between devices by trial in post hoc analysis ( < 0.01-0.98; < 0.01-0.93). Bias and LoA were -0.21 ± 16.77 W for the 1 min data. Mean TPS bias ranged from 3.37% to 7.81% of the measured SRM mean PO per trial. Linear regression SEE was 7.55 W for 1 min TPS prediction of SRM. ICC across trials was 0.96. No statistical difference ( = 0.09-0.11) in TPS CV (3.6-5.0%) and SRM CV (4.3-4.7%). The TPS is a valid and reliable power meter for estimating average indoor PO for time periods equal to or greater than 1 min and may have acceptable sensitivity to detect changes under less stringent criteria (±5%).
这项研究的目的是评估一种轮胎压力传感器（TPS）自行车功率计在室内自行车运动中的有效性和可靠性，该传感器与黄金标准（SRM）进行比较。十二名休闲运动员在室内混合滚轮上以不同的踩踏和齿轮组合完成了 90 秒的八次骑行试验。通过 TPS 和 SRM 同时计算功率输出（PO）。分析比较了两种设备每一次试验中 1 秒 PO 和 1 分钟平均 PO 的配对数据。通过相关性、线性回归、推断统计学、效应大小和 Bland-Altman LoA 来评估一致性。通过 ICC 和 CV 比较来评估可靠性。TPS 在 1 秒（ = 0.97， < 0.001）和 1 分钟数据（ = 0.99， < 0.001）上与 SRM 显示出近乎完美的相关性。配对 1 秒数据的差异具有统计学意义（ = 0.04），但幅度较小（ = 0.05）。在 1 分钟数据中，设备的主效应没有统计学意义（F（1,9）= 0.05， = 0.83，ηp2 = 0.97），事后分析也没有设备间的统计差异（< 0.01-0.98；< 0.01-0.93）。1 分钟数据的偏差和 LoA 为-0.21 ± 16.77 W。平均 TPS 偏差范围为每试验测量的 SRM 平均 PO 的 3.37%至 7.81%。线性回归的 SEE 为 1 分钟 TPS 预测 SRM 的 7.55 W。跨试验的 ICC 为 0.96。TPS 的 CV（3.6-5.0%）和 SRM 的 CV（4.3-4.7%）之间没有统计学差异（ = 0.09-0.11）。TPS 是一种有效的、可靠的功率计，可用于估计等于或大于 1 分钟的时间段内的室内平均 PO，并且在较不严格的标准（±5%）下可能具有检测变化的可接受敏感性。
