Table 4.
Cross-correlation values (Cr) and timelags (Lag) between the averaged global pattern of the control group and LBP participants of left and right ES activity. The values given are means with SDs in parentheses. Lags are expressed as percentage of stride cycle and negative signs (lower panel) indicate later peak activation
| Velocity (km/h) | left ES | Right ES | ||||
|---|---|---|---|---|---|---|
| Na | Cr | Lag % | Na | Cr | Lag % | |
| Comfortable | 11 | 0.81 (0.20) | +2.3 (2.9) | 11 | 0.55 (0.25) | +2.5 (2.6) |
| 3.0 | 14 | 0.66 (0.29) | +3.1 (2.9) | 13 | 0.66 (0.30) | +1.6 (2.8) |
| 3.8 | 15 | 0.76 (0.23) | +2.5 (2.6) | 15 | 0.57 (0.34) | +3.3 (4.0) |
| 4.6 | 14 | 0.80 (0.21) | +1.8 (2.2) | 13 | 0.56 (0.35) | +3.2 (4.7) |
| 5.4 | 9 | 0.69 (0.23) | +3.5 (2.0) | 9 | 0.71 (0.24) | +1.0 (1.8) |
| 6.2 | 9 | 0.62 (0.34) | +4.3 (5.5) | 9 | 0.67 (0.33) | +2.8 (5.0) |
| 7.0 | 4 | 0.74 (0.19) | +1.2 (1.2) | 3 | 0.68 (0.31) | +2.4 (4.9) |
| Averageb | 0.71 | +2.7 | 0.64 | +2.4 | ||
| Comfortable | 8 | 0.76 (0.10) | −4.3 (4.2) | 8 | 0.72 (0.17) | −5.3 (4.8) |
| 3.0 | 5 | 0.72 (0.32) | −2.7 (3.2) | 6 | 0.39 (0.36) | −3.7 (3.5) |
| 3.8 | 4 | 0.56 (0.32) | −4.0 (3.2) | 4 | 0.51 (0.36) | −2.3 (2.2) |
| 4.6 | 3 | 0.54 (0.39) | −5.3 (4.3) | 5 | 0.73 (0.15) | −1.5 (0.9) |
| 5.4 | 6 | 0.75 (0.29) | −4.6 (4.3) | 6 | 0.54 (0.23) | −5.7 (2.9) |
| 6.2 | 4 | 0.48 (0.33) | −5.6 (5.1) | 4 | 0.43 (0.27) | −7.2 (3.9) |
| 7.0 | 1 | 0.56 (0.50) | −7.0 (8.3) | 2 | 0.49 (0.29) | −4.9 (6.0) |
| Averageb | 0.60 | −4.9 | 0.52 | −4.2 | ||
aNumber of LBP participants with positive or negative time delay
bAveraged over all prescribed walking velocities