Table 3.
Jerk and duration of sit-to-stand (STS) phases (ascent, stand, descent, sitting for younger and older adults considering time 1 (initial-stage) and time 2 (late-stage) of repetitive STS.
| Younger | Older | |||
|---|---|---|---|---|
| Time 1 | Time 2 | Time 1 | Time 2 | |
| Jerk (m/s3) | ||||
| Ascent | 1.75 ± 0.11 | 1.45 ± 0.10 | 1.94 ± 0.22 | 1.87 ± 0.44 |
| Stand | 0.05 ± 0.06 | 0.03 ± 0.05 | −0.05 ± 0.04 | −0.03 ± 0.04 |
| Descent | −1.44 ± 0.10 | −1.28 ± 0.07 | −1.43 ± 0.15 | −1.45 ± 0.18 |
| Sitting | −0.18 ± 0.09 | −0.12 ± 0.06 | 0.01 ± 0.06 | −0.05 ± 0.04 |
| Duration (s) | ||||
| Ascent | 0.41 ± 0.02 | 0.47 ± 0.02t | 0.37 ± 0.04 | 0.49 ± 0.06t |
| Stand | 0.48 ± 0.06 | 0.49 ± 0.05 | 0.58 ± 0.05 | 0.66 ± 0.06 |
| Descent | 0.47 ± 0.02 | 0.50 ± 0.02 | 0.46 ± 0.05 | 0.53 ± 0.05 |
| Sitting | 0.70 ± 0.07 | 0.60 ± 0.08 | 0.73 ± 0.07 | 0.61 ± 0.07 |
Values are means and SEs. tTime main effect.