Hadžić Vedran, Širok Brane, Malneršič Aleš, Čoh Milan
Faculty of Sport, University in Ljubljana, Ljubljana 1000, Slovenia.
Faculty of Mechanical Engineering, University in Ljubljana, Ljubljana 1000, Slovenia.
J Sport Health Sci. 2019 Jan;8(1):89-92. doi: 10.1016/j.jshs.2015.08.002. Epub 2015 Nov 4.
Infrared thermographic imaging (IRTG) is a safe and reliable technology used to monitor skin temperature. The main aim of our study was to evaluate the relationship between skin temperature changes and muscle fatigue in order to answer the main research question if IRTG can be used to monitor muscle fatigue.
This was a case study performed on a 23-year-old trained middle distance runner. After warm-up the subject was exercising on the dynamometer for 7.5 min at 120°/s performing only concentric contractions of quadriceps. At the same time IRTG recording of both (exercising and non-exercising) quadriceps was performed.
A correlational analysis that was performed in order to quantify the relationship between power and temperature change over time has shown that there is a significant negative correlation between skin temperature increase and power decrease ( = -0.543, = 0.036) of exercising quadriceps. In linear regression model the exercising quadriceps power could be predicted from skin temperature. No such relationships were noted for the non-exercising limb that served as a control.
We believe that correlation between skin temperature change and muscle power output as described in this case study deserves further analysis on the larger sample including subjects of the different ages, health status, and physical abilities in order to create a new tool for monitoring the muscle fatigue.
红外热成像（IRTG）是一种用于监测皮肤温度的安全可靠技术。我们研究的主要目的是评估皮肤温度变化与肌肉疲劳之间的关系，以回答IRTG是否可用于监测肌肉疲劳这一主要研究问题。
这是一项针对一名23岁的训练有素的中长跑运动员的案例研究。热身之后，受试者在测力计上以120°/秒的速度进行7.5分钟的运动，仅进行股四头肌的向心收缩。与此同时，对两侧（运动的和未运动的）股四头肌进行IRTG记录。
为了量化功率与随时间变化的温度之间的关系而进行的相关性分析表明，运动的股四头肌的皮肤温度升高与功率降低之间存在显著的负相关（r = -0.543，p = 0.036）。在线性回归模型中，可以根据皮肤温度预测运动的股四头肌的功率。作为对照的未运动肢体未发现此类关系。
我们认为，本案例研究中描述的皮肤温度变化与肌肉功率输出之间的相关性值得在更大的样本中进行进一步分析，该样本应包括不同年龄、健康状况和身体能力的受试者，以便创建一种监测肌肉疲劳的新工具。
