Age-Related Differences in Stepping Response When Stepping onto a Known Soft Surface under Dual Task Conditions

Table 3

The mean rate of each phase as a percentage of the total stepping task time compared between ages; DIP = duration of initiation phase, DPP = duration of preparatory phase, DSP = duration of swing phase, and DDP = duration of double-stance phase.

			%DIP	%DPP	%DSP	%DDP
Flat surface	young	Single	18.80±1.88	27.89±2.82	33.84±3.22	19.46±4.81
		Dual	17.75±2.43	25.08±2.86	36.94±2.64	20.23±3.82
	older	Single	19.00±4.08	26.79±3.66	32.07±4.95	22.14±5.35
		Dual	18.94±3.26	25.90±2.54	32.73±4.47^∗	22.39±6.17
Soft surface	young	Single	17.81±1.54	27.21±3.70	38.29±3.35	16.74±2.71
		Dual	17.03±1.75	25.63±4.19	38.12±3.97	19.22±2.52
	older	Single	19.01±2.82	25.80±3.54	35.06±2.48^∗	20.09±2.38^∗∗
		Dual	19.40±2.46^∗	23.82±2.62	34.20±3.44^∗	22.60±4.10^∗

aSignificant difference from young adults 　(^∗𝑃<.05, ^∗∗𝑃<.01).