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Table 1 Comparison of RPM measurements from direct observation and the Garmin Vector (n = 9)

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

  Direct observationa (RPM) Garmin vector (RPM) Mean difference (RPM) Mean absolute percent error (%) <1 RPM error (%) <3 RPM error (%) <5 RPM error (%)
Minute-by-minute 56.4 ± 0.8 56.3 ± 0.8 0.1 ± 0.1* 1.5 ± 0.2 78.8 98.4 99.5
95 % CI (54.8, 58.0) (54.8, 57.9) (−0.1, 0.3) (1.0, 2.0)    
Trialb 56.5 ± 3.6 56.5 ± 3.5 0.1 ± 0.1* 0.5 ± 0.2 100.0 100.0 100.0
95 % CI (48.3, 64.7) (48.4, 64.6) (−0.2, 0.3) (0.1, 0.8)    
  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