Parameter | Young adults (n= 16) | Older adults (n= 16) | ||||
---|---|---|---|---|---|---|
 | Pre | Post | T5 | Pre | Post | T5 |
Gait velocity under ST condition (cm/s) | 126.3 ± 16.6 | 121.8 ± 14.7 | 125.9 ± 17.1 | 124.2 ± 14.9 | 127.7 ± 13.7 | 125.5 ± 14.0 |
Gait velocity under DT condition (cm/s) | 113.8 ± 15.5 | 110.9 ± 15.9 | 113.9 ± 15.0 | 106.2 ± 18.4 | 116.5 ± 18.7 | 116.6 ± 19.0 |
DT costs in gait velocity (%) | 9.6 ± 8.4 | 9.1 ± 5.9 | 9.3 ± 5.8 | 14.1 ± 11.4 | 8.7 ± 10.9 | 7.5 ± 8.2 |
Stride length under ST condition (cm) | 136.6 ± 15.8 | 132.6 ± 13.2 | 135.9 ± 14.4 | 138.6 ± 9.9 | 139.3 ± 9.9 | 138.3 ± 9.1 |
Stride length under DT conditions (cm) | 129.9 ± 13.8 | 126.9 ± 14.9 | 129.5 ± 12.9 | 128.2 ± 11.7 | 133.8 ± 13.1 | 132.8 ± 12.5 |
DT costs in stride length (%) | 4.7 ± 4.6 | 4.4 ± 3.6 | 4.6 ± 3.2 | 7.2 ± 5.9 | 4.0 ± 6.7 | 4.1 ± 4.8 |
Stride length variability under ST condition (cm) | 1.7 ± 0.9 | 1.9 ± 0.8 | 1.2 ± 0.4 | 2.0 ± 0.7 | 1.9 ± 1.0 | 1.8 ± 0.9 |
Stride length variability under DT conditions (cm) | 1.9 ± 0.8 | 2.0 ± 0.4 | 1.9 ± 0.7 | 4.0 ± 2.8 | 2.0 ± 1.0 | 2.6 ± 0.9 |
DT costs in stride length variability (%) | -50.3 ± 95.9 | -24.8 ± 71.8 | -76.6 ± 109.7 | -116.0 ± 177.1 | -58.2 ± 145.1 | -66.6 ± 87.1 |
Performance in the CI task during walking (number of correct subtractions) | 6.1 ± 1.5 | 7.6 ± 1.4 | 7.4 ± 1.8 | 5.1 ± 2.0 | 6.0 ± 1.7 | 5.9 ± 1.5 |