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People are paying more and more attention to factors that damage health in daily life. After a lot of physical labor or sports activities, the human body will produce sports fatigue. According to the characteristics of sports physical strength in sports, this paper conducts monitoring and analysis of physical strength in sports on the basis of independent component analysis. Moreover, according to the characteristics of the physical fatigue, the physical fatigue is systematically analyzed. In addition, this paper combines the ergonomics theory to determine the influencing factors of physical fatigue, puts forward a set of evaluation index system for the effectiveness analysis of physical fatigue, and establishes a more objective and systematic independent component analysis and evaluation model of physical fatigue. Finally, this paper constructs a model of an intelligent control system of physical strength in sports according to the actual situation of physical strength in sports, and analyzes the performance of the system through case test analysis. The experimental results verify the reliability of the system model constructed in this paper. [ABSTRACT FROM AUTHOR]