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

From: Validation of an integrated pedal desk and electronic behavior tracking platform

  Garmin vectora (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)    
Trialb 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)    
  1. Values are presented as mean ± SE unless otherwise noted
  2. RPM revolutions per minute
  3. * Significantly > −1.5 and < 1.5 at p < 0.025
  4. aCriterion measure
  5. bRPM measurements for trial level data were averaged over an approximate 20 min period