Segment angle. The thigh angle motion was similar between the two movements. The maximum thigh angle was similar in the dorsiflexion sprint drill (5 deg) and the traditional sprint drill (3 deg). The minimum thigh angle for the dorsiflexion sprint drill ( -75 deg) was greater than in the traditional sprint drill ( -84 deg). As a result, the range of motion for the dorsiflexion sprint drill (78 deg) was less than in the traditional sprint drill (89 deg).
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Figure 3. Thigh angle during the dorsiflexion sprint drill (left) and traditional sprint drill (right). Thigh angle is calculated from the vertical axis about the hip. Anatomical position corresponds to zero degrees. Increasing values represent clockwise rotation. | |
Joint angle 1. The hip angle motion was similar between the two movements. The maximum flexion angle was similar in the dorsiflexion sprint drill (186 deg) and the traditional sprint drill (187 deg). The maximum extension angle was greater in the dorsiflexion sprint drill (116 deg) than in the traditional sprint drill (107 deg). As a result, the range of motion was less in the dorsiflexion sprint drill (70 deg) than in the traditional sprint drill (80 deg).
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Figure 4. Hip angle during the dorsiflexion sprint drill (left) and the traditional sprint drill (right). Hip angle is calculated as the angle between the thigh and the lower leg. Anatomical position corresponds to 180 degrees. Increasing values represent flexion. | |
Joint angle 2. The knee angle motion was similar between the two movements. The maximum flexion angle was less in the dorsiflexion sprint drill (39 deg) than in the traditional sprint drill (65 deg). The maximum extension angle in the dorsiflexion sprint drill (173 deg) was similar to the traditional sprint drill (174 deg). As a result, the range of motion in the dorsiflexion sprint drill (134 deg) was greater than the traditional sprint drill (110 deg).+-
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Figure 5. Knee angle during the dorsiflexion sprint drill (left) and the traditional sprint drill (right). Knee angle is calculated as the angle between the thigh and the lower leg. Anatomical position corresponds to 180 degrees. Increasing values represent extension. | |
Joint velocity. The hip angular velocity was similar for both the dorsiflexion sprint drill and the traditional sprint drill. The maximum flexion angular velocity in the dorsiflexion sprint drill (-380 deg) was greater than in the traditional sprint drill (-388 deg). The maximum extension angular velocity in the dorsiflexion sprint drill (384 deg) was less than in the traditional sprint drill (399 deg).
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Figure 6. Hip angular velocity in the dorsiflexion sprint drill (left) and the traditional sprint drill (right). Positive values represent flexion. | |
Angle-Angle Plot. There was similar coordination between the thigh and knee angles in the dorsiflexion sprint drill and the traditional sprint drill. At the beginning of the motion there was thigh rotation in the counter-clockwise direction coupled with knee flexion. Following the reversal point, there was thigh rotation in the clockwise direction coupled with knee extension. The slope of the dorsiflexion sprint drill was less than in the traditional sprint drill. Relative to the knee angle, the range of motion was greater for the thigh angle in the dorsiflexion sprint drill when compared to the traditional sprint drill. Relative to the thigh angle, the range of motion of the knee angle was greater in the traditional sprint drill than in the dorsiflexion sprint drill. Overall, the range of motion for the dorsiflexion sprint drill was less than in the traditional sprint drill.
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Figure 7. Coordination of thigh and knee angles in the dorsiflexion sprint drill (left) and the traditional sprint drill (right). The tail of the arrows mark the beginning of the movement and the head of the arrows show the direction in which the movement occurred. | |
