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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
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BMC Research Notes

ISSN: 1756-0500

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