School of Health and Human Sciences, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia.
J Electromyogr Kinesiol. 2010 Oct;20(5):980-7. doi: 10.1016/j.jelekin.2009.11.003. Epub 2009 Dec 11.
The purpose of this study was to determine the test-retest reliability of the soleus (SOL) H-reflex during rest and isometric contractions at 10%, 30%, and 50% of the maximal voluntary force (MVC) at the ankle joint angles of neutral (0 degrees), plantarflexion (20 degrees), and dorsiflexion (-20 degrees) respectively, in a sitting position. Ten healthy participants, with mean age of 24.9+/-5.0 (SD) years, height 168.3+/-8.8 cm, weight 62.7+/-12.3 kg, were tested for the SOL H-reflex (H(max)) on two separate occasions within 7 days. The intraclass correlation coefficient (ICC) for the test-retest of the SOL H-reflex during rest was found to be high at ankle joint angle of neutral (ICC=0.92) and plantarflexion (0.96), and moderate at dorsiflexion (0.75). Inconsistent ICC values (range from 0.62 to 0.97) were found during the submaximal voluntary contractions at the three ankle joint positions. High ICCs were also found in H(max)/M(max) ratio at neutral (0.86), plantarflexion (0.96), and dorsiflexion (0.84) positions. It was concluded that the test-retest reliability of the SOL H-reflex was affected by the intensity of voluntary contraction and ankle joint position. The H-reflex demonstrated a higher reliability at the neutral and plantarflexion positions than that at the dorsiflexion position during rest, and a higher reliability at 10% MVC than that at 30% and 50% MVC.
本研究旨在确定在坐姿下，踝关节中立位（0 度）、跖屈位（20 度）和背屈位（-20 度），分别在 10%、30%和 50%最大自主收缩力（MVC）下，在休息状态和等长收缩时，比目鱼肌 H 反射（H(max)）的测试-重测信度。10 名健康参与者，平均年龄 24.9+/-5.0（SD）岁，身高 168.3+/-8.8cm，体重 62.7+/-12.3kg，在 7 天内分别进行了两次比目鱼肌 H 反射（H(max)）测试。在踝关节中立位（ICC=0.92）和跖屈位（0.96）时，比目鱼肌 H 反射在休息时的测试-重测 ICC 值较高，在背屈位时为中度（0.75）。在三个踝关节位置的次最大自主收缩时，发现 ICC 值不一致（范围从 0.62 到 0.97）。在中立位（0.86）、跖屈位（0.96）和背屈位（0.84）时，H(max)/M(max)比值的 ICC 值也很高。研究结论认为，比目鱼肌 H 反射的测试-重测信度受自愿收缩强度和踝关节位置的影响。在休息时，H 反射在中立位和跖屈位的可靠性高于背屈位，在 10%MVC 时的可靠性高于 30%和 50%MVC 时的可靠性。
