Timing and magnitudes of hindlimb force patterns for high walking alligators
| Variable . | Mean ± s.d. . |
|---|---|
| Maximum vertical force | 0.532±0.027 |
| Time to maximum vertical force | 35.8±2.4 |
| Maximum braking force | 0.054±0.018 |
| Time to maximum braking force | 6.0±0.7 |
| Time to braking-to-propulsive transition | 15.4±0.9 |
| Maximum propulsive force* | −0.059±0.125 |
| Time to maximum propulsive force | 64.4±5.4 |
| Maximum lateral force** | −0.106±0.011 |
| Time to maximum lateral force | 19.1±1.4 |
| Variable . | Mean ± s.d. . |
|---|---|
| Maximum vertical force | 0.532±0.027 |
| Time to maximum vertical force | 35.8±2.4 |
| Maximum braking force | 0.054±0.018 |
| Time to maximum braking force | 6.0±0.7 |
| Time to braking-to-propulsive transition | 15.4±0.9 |
| Maximum propulsive force* | −0.059±0.125 |
| Time to maximum propulsive force | 64.4±5.4 |
| Maximum lateral force** | −0.106±0.011 |
| Time to maximum lateral force | 19.1±1.4 |
Forces are in body weight units and times are in percentage of stance duration.
Data are from 20 three-dimensional hindlimb force records pooled across four individuals (N per individual=3, 5, 5, 7) averaging 0.148 m s−1 (range 0.110-0.167 m s−1) to match the speed of kinematic and gait data (average 0.146 m s−1) as closely as possible.
Negative force-aft values are accelerative forces.
Negative mediolateral values are lateral forces.