Gliottoni Rachael C, Motl Robert W
Department of Kinesiology and Community Health, University of Illinois, Urbana-Champaign, Urbana,IL 61820-3985, USA.
Int J Sport Nutr Exerc Metab. 2008 Apr;18(2):103-15. doi: 10.1123/ijsnem.18.2.103.
This experiment examined the effect of a moderate dose of caffeine on perceptions of leg-muscle pain during a bout of high-intensity cycling exercise and the role of anxiety sensitivity in the hypoalgesic effect of caffeine on muscle pain during exercise. Sixteen college-age women ingested caffeine (5 mg/kg body weight) or a placebo and 1 hr later completed 30 min of cycling on an ergometer at 80% of peak aerobic capacity. The conditions were completed in a counterbalanced order, and perceptions of leg-muscle pain were recorded during the bouts of exercise. Caffeine resulted in a large reduction in leg-muscle pain-intensity ratings compared with placebo (d = -0.95), and the reduction in leg-muscle pain-intensity ratings was larger in those with lower anxiety-sensitivity scores than those with higher anxiety-sensitivity scores (d = -1.28 based on a difference in difference scores). The results support that caffeine ingestion has a large effect on reducing leg-muscle pain during high-intensity exercise, and the effect is moderated by anxiety sensitivity.
本实验研究了中等剂量咖啡因对高强度骑行运动期间腿部肌肉疼痛感知的影响，以及焦虑敏感性在咖啡因对运动期间肌肉疼痛的痛觉减退作用中的作用。16名大学适龄女性摄入咖啡因（5毫克/千克体重）或安慰剂，1小时后在测力计上以最大有氧能力的80%完成30分钟的骑行。这些条件以平衡的顺序完成，并在运动期间记录腿部肌肉疼痛的感知。与安慰剂相比，咖啡因导致腿部肌肉疼痛强度评分大幅降低（d=-0.95），焦虑敏感性得分较低者的腿部肌肉疼痛强度评分降低幅度大于焦虑敏感性得分较高者（基于差异得分的差异，d=-1.28）。结果支持摄入咖啡因对减轻高强度运动期间的腿部肌肉疼痛有很大作用，且该作用受焦虑敏感性的调节。
