Dual-task costs while walking increase in old age for some, but not for other tasks: an experimental study of healthy young and elderly persons

Table 1 Dual-task costs of the constituent tasks in Exp. A and B.

Exp.	task combination	task	young Ss.	elderly Ss.	t
A	walk_o + memo	walk_o	-1.21 ± 5.71	1.22 ± 6.20	1.17^n.s.
		memo	3.84 ± 12.95	6.78 ± 15.91	0.58^n.s.
	walk_o+check_gw	walk_o	22.46 ± 8.58	28.64 ± 11.11	1.80^n.s.
		check_gw	28.86 ± 11.67	39.44 ± 20.71	1.84^n.s.
B	walk + check/g	walk	11.20 ± 6.37	13.84 ± 7.87	1.04^n.s.
		check_g	0.44 ± 12.00	14.53 ± 17.31	2.67*
	walk + check_gw	walk	16.02 ± 8.11	16.96 ± 10.61	0.28^n.s.
		check_gw	1.34 ± 17.25	10.61 ± 29.00	1.09^n.s.
	walk_o + check/g	walk_o	16.35 ± 7.19	18.34 ± 9.15	0.68^n.s.
		check_g	28.07 ± 12.82	44.81 ± 10.68	4.01***
	walk_o + check_gw	walk_o	23.83 ± 8.32	26.85 ± 13.80	0.74^n.s.
		check_gw	28.77 ± 16.36	39.36 ± 24.11	1.45^n.s.

Data columns indicate the mean ± standard deviation of DTC in young and elderly subjects, and the t-scores of t-tests, with n.s., *, and *** denoting p > 0.05, p < 0.05, and p < 0.001.

ISSN: 1743-0003