Table 1. Changes in the ROM of the hip joint and the muscle activity of the rectus femoris and biceps femoris during obstacle crossing on the ground and underwater (M±SD).

		Unaffected side lead	Affected side trail	Affected side lead	Unaffected side trail
Hip flexion-extension	Ground	−2.19±2.59a)	0.17±2.46	6.33±2.41	3.54±1.96
	Underwater	−3.72±2.31	11.63±1.94*	21.25±2.72*	0.61±2.67*
Rectus femoris	Ground	48.63±13.42	30.5±18.7	26.25±15.23	80.98±22.58
	Underwater	27.79±6.08*	24.93±5.40	14.26±2.74	30.67±5.69*
Biceps femoris	Ground	76.76±13.36	68.15±11.36	63.88±14.44	92.05±14.13
	Underwater	38.37±16.60*	50.82±13.74*	28.98±9.79*	31.59±17.67*

^a)Positive values indicate flexion, and negative values indicate extension. *p<0.05