Department of Nutrition, Exercise and Sports (NEXS), Faculty of Science, University of Copenhagen, Nørre Allé 51, DK-2200 Copenhagen, Denmark.
Sensors (Basel). 2021 Nov 12;21(22):7516. doi: 10.3390/s21227516.
The SHFT device is a novel running wearable consisting of two pods connected to your smartphone issuing several running metrics based on accelerometer and gyroscope technology. The purpose of this study was to investigate the reliability and validity of the power output (PO) metric produced by the SHFT device. To assess reliability, 12 men ran on an outdoor track at 10.5 km·h and 12 km·h on two consecutive days. To assess validity, oxygen uptake (VO) and SHFT data from eight men and seven women were collected during incremental submaximal running tests on an indoor treadmill on one to four separate days (34 tests in total). SHFT reliability on the outdoor track was strong with coefficients of variance (CV) of 1.8% and 2.4% for 10.5 and 12 km·h, respectively. We observed a very strong linear relationship between PO and VO (r = 0.54) within subjects, and a very strong linear relationship within each subject within each treadmill test (r = 0.80). We conclude that SHFT provides a reliable running power estimate and that a very strong relationship between SHFT-Power and metabolic rate exists, which places SHFT as one of the leading commercially available running power meters.
SHFT 设备是一种新颖的跑步可穿戴设备，由两个 Pod 组成，与智能手机相连，可根据加速度计和陀螺仪技术提供多项跑步指标。本研究旨在探讨 SHFT 设备产生的功率输出（PO）指标的可靠性和有效性。为了评估可靠性，12 名男性连续两天在户外跑道上以 10.5 公里/小时和 12 公里/小时的速度跑步。为了评估有效性，在室内跑步机上进行递增次最大跑步测试期间，收集了 8 名男性和 7 名女性的氧气摄取量（VO）和 SHFT 数据，总共进行了 4 天的 34 次测试。在户外跑道上，SHFT 的可靠性很强，10.5 公里/小时和 12 公里/小时的 CV 分别为 1.8%和 2.4%。我们观察到受试者内 PO 和 VO 之间存在非常强的线性关系（r = 0.54），并且每个跑步机测试内的每个受试者之间也存在非常强的线性关系（r = 0.80）。我们得出结论，SHFT 提供了可靠的跑步功率估计，并且 SHFT 功率和代谢率之间存在很强的关系，这使 SHFT 成为市场上领先的商用跑步功率计之一。
