Accelerometer-Based Automated Counting of Ten Exercises without Exercise-Specific Training or Tuning
Table 2
Root mean square error (RMSE) of counts for each analysis technique.
Exercise
Threshold crossing
Threshold with low pass
Fourier
Avg RMSE
Arm circle
1.99
9.65
8.08
7.36
Bicep curl
16.70
7.36
12.29
12.71
Bridge
13.94
14.39
7.07
12.27
Crunch
7.32
8.56
12.18
9.58
Elbow extension
13.70
10.20
10.57
11.59
Lower trunk rotation
13.47
9.97
7.45
10.59
Lunge
16.95
1.83
0.76
9.85
Push-ups
10.53
1.39
3.70
6.49
Squats
10.71
1.50
0.93
6.27
Upper trunk rotation
19.06
9.77
14.11
14.81
Avg RMSE
13.38
8.69
9.00
Threshold crossing with a low-pass filter performs best with an average root mean square error of 8.69, with the Fourier transform being close with 9.00.
