肌氧含量的近红外无损监测及其与气体交换率的对比研究

目的研究运动过程中人体骨骼肌组织肌氧含量的相对变化与心率、摄氧量和气体交换率间的关系。方法利用近红外肌氧监测系统，在体、实时监测中长跑运动员在跑台上运动时肌氧含量的相对变化，并同步测定和记录被试者的心率(HR)、摄氧量(VO2)、二氧化碳呼出量(VCO2)和气体交换率(RER)等参数。结果随着运动强度的改变，上述所测参数均呈现规律性的变化。在0．01水平上，氧合血红蛋白(HbO2)含量的相对变化与HR、VO2，和RER间均具有高度的相关性。结论本研究为无损监测和评定运动员的生理机能状况、掌握训练强度和评价训练效果引入新的测试技术和生物学监测指标。

Relationship between Respiration Exchange Ratio and Muscle Oxygen Content Measured by Near-infrared Spectroscopy

Objective: To study the relationship between respiration exchange ratio (RER) and tissue oxygen content in human skeletal muscle. Method: Using a portable tissue oximeter based on near-infrared spectroscopy (NIRS), the relative changes of skeletal muscle oxygen content were measured non-invasively and in vivo when healthy volunteers were performing an incremental intensity running protocol. The results were compared with heart rate (HR), VO2, VCO2, and RER. Result: In the experiment, the change in skeletal muscle oxygenation content of the volunteers was regular and has a significant close relationship to HR, VO2 and RER (P=0.01). Conclusion: It shows that NIRS is a new photonic technology which provides a measurable biomedical parameter for the evaluation of athlete's physique and training effect. It offers reference for monitoring and assessing training effect in vivo, real-time and non-invasively.