Abstract

This study indicates that patients 6 months after ACL reconstruction prefer to unconsciously or consciously pretension the calf muscles in expectation of the landing in a single leg hop test. Pre-activity increases the sensitivity of the muscle spindels allowing Joint perturbation to be detected more quickly. A possible factor could be that ACL-reconstructed patients continue to use the motor program they used pre-operatively while having an ACL-deficient knee. Another possibility is that the lower extremity adaptaions were learned early in rehabilitation to protect the donor site. This may require more time than the 6 months after the reconstruction to "reprogram" the neuromuscular System. Verf.-Referat