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Table 1 Comparison of forces measured by force plate and motion capture system. Kinetic data (X ± SD) for the concentric phase of body weight squats as measured directly from a force plate or as derived from a motion capture system. No significant differences were observed between any trials or between measurement systems (p > 0.05)

From: Validation of a motion capture system for deriving accurate ground reaction forces without a force plate

Variable Trial Force plate Motion capture system
Peak Force (N) 1 1210.4 ± 280.2 1206.3 ± 288.7
2 1205.1 ± 278.9 1189.2 ± 260.9
3 1216.7 ± 310.3 1219.4 ± 328.4
Lowest Force (N) 1 745.8 ± 107.9 739.8 ± 92.9
2 736.3 ± 98.2 738.5 ± 103.9
3 712.9 ± 86.7 713.6 ± 83.4
Mean Force (N) 1 923.3 ± 150.9 931.1 ± 154.2
2 932.9 ± 153.1 931.6 ± 147.0
3 925.9 ± 132.7 921.2 ± 132.6