A Preliminary Investigation about the Influence of WIMU PRO Location on Heart Rate Accuracy: A Comparative Study in Cycle Ergometer.

Technological development has boosted the use of multi-sensor devices to monitor athletes' performance, but the location and connectivity between devices have been shown to affect data reliability. This preliminary study aimed to determine whether the placement of a multi-sensor device (WIMU PRO) could affect the heart rate signal reception (GARMIN chest strap) and, therefore, data accuracy. Thirty-two physical education students (20 men and 12 women) performed 20 min of exercise in a cycle ergometer based on the warm-up of the Function Threshold Power 20 test in laboratory conditions, carrying two WIMU PRO devices (Back: inter-scapula; Bicycle: bicycle's handlebar-20 cm from the chest) and two GARMIN chest straps. A one-dimensional statistical parametric mapping test found full agreement between the two situations (inter-scapula vs. bicycle's handlebar). Excellent intra-class correlation values were obtained during the warm-up (ICC = 0.99, [1.00-1.00], < 0.001), the time trial test (ICC = 0.99, [1.00-1.00], < 0.001) and the cool-down (ICC = 0.99, [1.00-1.00], < 0.001). The Bland-Altman plots confirmed the total agreement with a bias value of 0.00 ± 0.1 bpm. The interscapular back placement of the WIMU PRO device does not affect heart rate measurement accuracy with a GARMIN chest strap during cycling exercise in laboratory conditions.