Table 2.
Mean (SD) gait speeds (m/s) for each condition and each gait task. Values are only from the subjects with gait speed data for all conditions.
| Gait task | Young adults (n = 19) | Older adults (n = 12) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Single-task | Dual-stroop | Dual-clock | Mean | Single-task | Dual-stroop | Dual-clock | Mean | |||||||||
| SS | 1.50 | (0.17) | 1.49 | (0.16) | 1.46 | (0.22) | 1.48 | (0.17) | 1.31 | (0.29) | 1.24a | (0.26) | 1.28 | (0.31) | 1.28 | (0.29) |
| FC | 1.97b | (0.21) | 1.90 | (0.17) | 1.90a,b | (0.20) | 1.93 b | (0.19) | 1.51b | (0.37) | 1.44b | (0.39) | 1.39a,b | (0.36) | 1.44 b | (0.37) |
| OB | 1.96c | (0.21) | 1.88a,c | (0.19) | 1.87a,c | (0.21) | 1.90 c | (0.20) | 1.42c,d | (0.40) | 1.32a,c,d | (0.36) | 1.30a,d | (0.36) | 1.35 d | (0.37) |
| Mean | 1.81 | (0.17) | 1.76 a | (0.15) | 1.75 a | (0.18) | 1.77 | (0.24) | 1.41 | (0.35) | 1.33 | (0.33) | 1.32 a | (0.34) | 1.36* | (0.24) |
SS: walking at self-selected speed, FC: walking at fastest comfortable speed, OB: walking at fastest comfortable speed with obstacle crossing.
aSignificant differences between single-task and dual-task (none of the differences between the two dual-tasks were significant), P ≤ .05 (Tukey's HSD).
bSignificant differences between self-selected and fast, P ≤ .05 (Tukey's HSD).
cSignificant differences between self-selected and fast obstacle, P ≤ .05 (Tukey's HSD).
dSignificant differences between fast and fast obstacle, P ≤ .05 (Tukey's HSD).
*Significant difference between older adults and young adults, P < .001.