Relationship between gait kinematics and walking energy expenditure during pregnancy in South African women

Table 2 Pearson correlations between body weight, gait kinematics and walking energy expenditure

	COG_{V (m)}	COG_{ML (m)}	GR O_{2 (ml/kg/min)}	NR O₂ (ml/kg/min)	NC O₂ (ml/kg/m)	Mass _(kg)	M_gain (kg)
Mass _(kg)	−0.18	0.24	−0.15	−0.19	− 0.11	–	–
M_{gain (kg)}	−0.01	0.50^***	−0.04	− 0.08	−0.02	0.43^**	–
S (m/s)	0.75^***	−0.18	0.30^*	0.70^***	0.53^***	−0.43^**	−0.27
Stride length^a	0.32^*	−0.39^**	−0.18	0.09	−0.01	− 0.01	−0.29
Step width^a	0.09	−0.02	0.20	0.19	0.22	0.05	0.38^**
DS time _(s)	−0.17	0.00	0.23	−0.23	−0.18	0.15	0.34^*
COG_{V (m)}	–	–	0.11	0.45^**	0.30^*	−0.18	− 0.01
COG_{ML (m)}	−0.03	–	− 0.10	−0.12	− 0.09	0.24	0.50^***
REE _{(kcal/day/kg)}	–	–	0.04	0.03	−0.04	−0.85^***	− 0.31^*

^*p ≤ 0.05; ^** ≤ 0.01; ^*** ≤ 0.001; M_gain = mass relative to pre-pregnancy mass; S = walking speed; DS = double support; COGv = vertical excursion of the centre of gravity; COG_ML = medio-lateral centre of gravity displacement; ^anormalized for leg length; GR O₂ = gross O₂ rate; NR O₂ = net O₂ rate; NC O₂ = net O₂ cost; REE = resting energy expenditure

ISSN: 2052-1847