无机盐是人体的重要组成成分，与组织兴奋性、收缩性有关。而目前对阳离子研究较多，有关阴离子的研究较少。作者研究不同组织（血液、组织间液、肌肉）和不同肌肉在运动疲劳时Ｃｌ￣－的变化，并探讨和疲劳的关系。结果表明：运动疲劳时，Ｃｌ￣－：除股直肌外各组织均升高并具有显著性；血液和心肌升高，股直肌降低，臀浅肌尤变化；血液、组织间液、股直肌升高，心肌、臀浅肌无变化。 Inorganic salts are important components of the body, and tissue excitability, contractility related. At present, there are more studies on cations and less on anions. The authors studied changes in Cl ~ - in different tissues (blood, interstitial fluid, muscle) and different muscles during exercise fatigue and explored the relationship with fatigue. The results showed that: during exercise fatigue, Cl ~ -: except for the rectus femoris were increased in all tissues and significant; blood and myocardium increased, lower rectus femoris muscle, especially the superficial gluteal muscle changes; blood, interstitial fluid, stock Rectus muscle increased, myocardium, superficial muscle no change.