Characterizing the Validity of the Inverted Pendulum Model for Quiet Standing

Table 1

Mean, standard deviation, and values of the COP feature MVAP and the proposed feature IPVI.

Features	Age group		values
	Younger	Older
MVAP	5.45 ± 1.06	7.28 ± 2.00	9.52 × 10^−4
IPVI	0.869 ± 0.024	0.919 ± 0.017	6.83 × 10^−9

Values of the features are mean ± standard deviation. Units of features are as follows: mm/s (MV_AP) and dimensionless (IPVI).