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[Efficacy of stairclimber for muscle strengthening in a closed system after anterior cruciate ligament reconstruction].

UNLABELLED
In a prospective study we investigated the value regarding muscle strength of two stairclimbers with either coupled or non-coupled pedals at either high or low stepping frequency. Following autologous patellar tendon graft surgery 14 patients for each group completed a strict exercising program. After 6 weeks of training a clear advantage was found for the group stepping at low speed with coupled pedals when measuring: At 60 degree/s the average maximum torque of extension increased from 37.7 to 61.7% as compared to a control group (30 to 47.2%). Analogous the percent ratio of flexion/extension (H/Q ratio) improved significantly. During the second training period the improvement of the extension strength as well as the H/Q ratio was found to be only marginal. No negative effects of this type of training on ligament stability could be detected.


CONCLUSIONS
Regarding a faster recovery of muscle strength and the improvement of the intermuscular coordination, the stairclimber training, beginning with week 7 after surgery and lasting over a period of 6 weeks, is considered advantageous, especially when exercising is done at low speed and with coupled pedals.