Koceja D M, Kamen G
Indiana University Motor Control Laboratory, Bloomington 47405.
Med Sci Sports Exerc. 1988 Apr;20(2):172-7. doi: 10.1249/00005768-198820020-00012.
Tendon reflex characteristics were examined in endurance-trained, sprint-trained, and control subjects (10 SS/group) using a conditioned patellar tendon reflex (PTR) paradigm. Paired PTRs were administered using inter-tap intervals of 0, 25, 50, 75, 150, and 300 ms, with the left leg reflex elicited first, followed by a right leg PTR. A force transducer secured at the ankle was used to measure peak force, time to peak force, and reflex latency. In the unilateral condition, significant differences (P less than 0.05) existed between athletic groups, with the sprint-trained athletes exhibiting greater peak force, faster time to peak force, and faster reflex latency than the endurance athletes. Significant differences (P less than 0.05) also existed for the conditioned reflex. There was a slight depression in reflex parameters in the untrained and sprint-trained groups up to an interval of 50 ms. At later intervals (greater than 50 ms), a marked enhancement occurred in all groups for all dependent measures studied. This longer latency excitatory effect persisted until the 150 ms interval. These differences in both simple and conditioned reflexes in individuals trained for endurance and sprint activities may reflect inherent differences in muscle-tendon stiffness or neural organization.
采用条件性髌腱反射（PTR）范式，对耐力训练组、短跑训练组和对照组（每组10名受试者）的腱反射特征进行了检查。使用0、25、50、75、150和300毫秒的刺激间隔施加配对的PTR，先引出左腿反射，然后是右腿PTR。固定在脚踝处的力传感器用于测量峰值力、达到峰值力的时间和反射潜伏期。在单侧条件下，各运动组之间存在显著差异（P<0.05），短跑训练的运动员比耐力训练的运动员表现出更大的峰值力、更快的达到峰值力的时间和更快的反射潜伏期。条件反射也存在显著差异（P<0.05）。在未训练组和短跑训练组中，直到50毫秒的间隔，反射参数都有轻微下降。在随后的间隔（大于50毫秒），所有组中所有研究的相关测量指标都出现了明显增强。这种较长潜伏期的兴奋效应一直持续到150毫秒的间隔。在耐力和短跑活动训练的个体中，简单反射和条件反射的这些差异可能反映了肌腱刚度或神经组织的内在差异。
