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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