Dose Response of Isometric Contractions on Pain Perception in Healthy Adults
Dose Response of Isometric Contractions on Pain Perception in Healthy Adults
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DOI：
10.1249/mss.0b013e31817eeecc
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发表时间：
2008-11-01
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影响因子：
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通讯作者：
Hunter, Sandra K.
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文献类型：
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作者：
Bement, Marie K. Hoeger;Dicapo, John;Hunter, Sandra K.
豪格·贝门特K.，迪卡波河RASIARMOS和S. K.猎人等长收缩对健康成人痛觉的剂量反应。医学科学体育锻炼：第40卷，第11期，第110页。1880-1889年，2008年。简介：该研究的目的是比较男性和女性在手肘屈肌进行不同强度和持续时间的等长收缩之前和之后的疼痛评级和阈值。研究方法：在以下等长收缩之前和之后，使用施加到对侧手指的压力装置评估疼痛感知：1）三次短暂的最大自主收缩（MVC），2）25%MVC持续直到任务失败，3）25%MVC持续2分钟，以及4）80%MVC持续直到任务失败。结果：高强度、长时间、低强度等长收缩产生镇痛反应。当压力施加到对侧手指时，疼痛阈值和疼痛等级的最大变化发生在长时间低强度收缩持续到失败之后。女性报告1）安静休息时疼痛阈值较低，疼痛等级较高，2）等长收缩前后疼痛等级较高，存在性别差异。结论：高阈运动单位的激活参与运动镇痛。
HOEGER BEMENT, M. K., J. DICAPO, R. RASIARMOS, and S. K. HUNTER. Dose Response of Isometric Contractions on Pain Perception in Healthy Adults. Med. Sci. Sports Exerc., Vol. 40, No. 11, pp. 1880-1889, 2008. Introduction: The purpose of the study was to compare pain ratings and thresholds in men and women before and after isometric contractions of varying intensity and duration performed with the elbow flexor muscles. Methods: Pain perception was assessed, using a pressure device applied to the contralateral finger, before and after the following isometric contractions: 1) three brief maximal voluntary contractions (MVC), 2) 25% MVC sustained until task failure, 3) 25% MVC sustained for 2 min, and 4) 80% MVC sustained until task failure. Results: High-intensity and long-duration, low-intensity isometric contractions produced an analgesic response. The greatest change in pain threshold and pain ratings, when pressure was applied to the contralateral finger, was after the long-duration, low-intensity contraction sustained until failure. Sex differences were present with women reporting 1) lower pain thresholds and higher pain ratings during quiet rest and 2) higher pain ratings before and after isometric contractions. Conclusion: These results suggest that activation of high-threshold motor units is involved in exercise-induced analgesia.