Validation of an integrated pedal desk and electronic behavior tracking platform

BMC Research Notes

Table 2 Comparison of RPM measurements from the Garmin Vector and the Pennington Pedal Desk™ (n = 41)

	Garmin vector^a (RPM)	Pedal desk (RPM)	Mean difference (RPM)	Mean absolute percent error (%)	<1 RPM error (%)	<3 RPM error (%)	<5 RPM error (%)
Minute-by-minute	54.8 ± 0.4	55.8 ± 0.4	−1.0 ± 0.1*	2.1 ± 0.1	55.9	96.7	99.5
95 % CI	(54.1, 55.6)	(55.0, 56.5)	(−1.1, −0.9)	(2.0, 2.2)
Trial^b	55.0 ± 1.7	56.0 ± 1.7	−1.0 ± 0.1*	1.8 ± 0.1	53.7	100.0	100.0
95 % CI	(51.6, 58.4)	(52.6, 59.3)	(−1.1, −0.9)	(1.6, 2.1)

Values are presented as mean ± SE unless otherwise noted
RPM revolutions per minute
* Significantly > −1.5 and < 1.5 at p < 0.025
^aCriterion measure
^bRPM measurements for trial level data were averaged over an approximate 20 min period

ISSN: 1756-0500