Krebs D E, Elbaum L, Riley P O, Hodge W A, Mann R W
Program in Physical Therapy, MGH Institute of Health Professions, Boston 02108-3402.
Phys Ther. 1991 Apr;71(4):301-9. doi: 10.1093/ptj/71.4.301.
Virtually all hip rehabilitation programs include exercise for muscle force development. The specific effects of various exercise modes on the hip joint itself are unknown. We will report on the effects of common exercise modalities on in vivo hip pressures. Four years prior to data collection, a pressure-instrumented Austin-Moore-type endoprosthesis was implanted in an otherwise healthy 73-year-old woman with a traumatic right hip fracture. Hip pressures during various experimental maneuvers were recorded periodically over a 5-year period. We compared measurements of peak pressure and rate of pressure rise obtained during gait with those obtained during isokinetic, isometric, and isotonic lower-limb exercises. Maximal exercise generated greater peak pressures than did gait, and tripling the angular velocity during exercise roughly tripled the rate of pressure rise. Torque production and resultant in vivo hip pressures varied directly during all experiments. Peak pressures and rate of pressure rise apparently can be controlled by varying the subject's exertion. The results reported are from a single subject; therefore, little generalizability is possible for these data. We suggest, however, that articular pressures may be important to rehabilitation planning; these data provide a direct insight into this potentially important exercise prescription consideration.
几乎所有的髋关节康复计划都包括增强肌肉力量的锻炼。各种锻炼方式对髋关节本身的具体影响尚不清楚。我们将报告常见锻炼方式对体内髋关节压力的影响。在收集数据的四年前，为一名73岁健康女性植入了带有压力测量装置的奥斯汀-摩尔型人工髋关节，该女性因创伤性右髋骨折接受治疗。在5年的时间里，定期记录各种实验动作过程中的髋关节压力。我们将步态过程中获得的峰值压力和压力上升速率的测量值与等速、等长和等张下肢运动过程中获得的测量值进行了比较。最大运动量产生的峰值压力比步态时更大，运动过程中角速度增加两倍，压力上升速率大致也增加两倍。在所有实验中，扭矩产生与体内髋关节压力直接相关。峰值压力和压力上升速率显然可以通过改变受试者的用力程度来控制。报告的结果来自单一受试者；因此，这些数据的普遍适用性有限。然而，我们认为关节压力可能对康复计划很重要；这些数据为这一潜在重要的运动处方考量提供了直接见解。
