Pain sensitivity after low-level clenching is influenced by preloading eccentric exercise
Pain sensitivity after low-level clenching is influenced by preloading eccentric exercise
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低强度紧握后的疼痛敏感性受预加载偏心运动的影响
DOI：
10.1007/s10266-020-00516-w
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发表时间：
2021
期刊：
影响因子：
2.5
通讯作者：
Svensson Peter
中科院分区：
文献类型：
--
作者：
Tanabe Yuichi;Torisu Tetsurou;Tada Hiroaki;Yamaguchi Erika;Murata Hiroshi;De Laat Antoon;Svensson Peter
目的探讨预负荷偏心运动对健康志愿者疼痛敏感性的影响。方法采用0 ~ 100 mm视觉模拟量表（visual analogue scale， VAS）评价20名健康志愿者在最大咬入时的疼痛相关感觉（疼痛、不愉快、疲劳、僵硬、紧张和酸痛6项）和反复电刺激咬肌和手掌引起的疼痛强度。采用偏心运动（6 min试验）或嚼口香糖（6 min对照）作为预负荷运动，评价预负荷运动2天后低水平握紧（15 min）前后对疼痛敏感性的影响。结果2天后，中心运动仅引起低水平的疼痛相关感觉。然而，四次电刺激对咬肌时间累加的时间过程受到预压运动类型的影响，即以偏心运动进行预压时，低水平握紧后时间累加增加（P= 0.016），而以嚼口香糖进行预压时，时间累加无显著变化。结论中心运动可通过中枢神经系统促进随后低水平握拳引起的疼痛敏感。此外，实验还表明，低强度握拳后的疼痛敏感性会受到预压运动类型的影响。这些实验结果可能表明，偏心运动可能是咬牙导致易感人群慢性疼痛的触发因素之一。
PurposeTo examine the effect of preloading eccentric exercise on pain sensitivity in healthy volunteers.MethodsIn 20 healthy volunteers, pain-related sensations (6 items: pain, unpleasantness, fatigue, stiffness, tension, and soreness during maximum biting), and pain intensities induced by repeated electrical stimuli on the masseter and the hand palm were evaluated using a visual analog scale (VAS) of 0–100 mm. Eccentric exercise (6 min—test) or gum chewing (6 min—control) was used as preloading exercise to evaluate the effect on pain sensitivities before and after low-level clenching (15 min) performed 2 days after the preloading exercise.ResultsEccentric exercise induced only low levels of pain-related sensations 2 days later. However, the time course of temporal summation induced by four repeated electrical stimuli on the masseter was influenced by the type of preloading exercise, i.e., temporal summation increased after the low-level clenching (P= 0.016) when preloading was done by the eccentric exercise, while no significant change was observed when preloading was done by the gum chewing.ConclusionsEccentric exercise may facilitate pain sensitivity induced by subsequent low-level clenching via the central nervous system. In addition, it was demonstrated that pain sensitivity after the low-level clenching could be influenced by the type of preloading exercise. These experimental results may suggest that eccentric exercise could act as one of the triggering factors in the mechanism by which tooth clenching leads to a chronic pain condition in susceptible individuals.