This paper provides an overview of the application of intelligent wearable devices and artificial intelligence algorithms in intelligent physical fitness training. First, it outlines the technological developments in both areas. Then, it focuses on their integration in various aspects of physical fitness training, including data collection by smart devices, model establishment, and training optimization using AI algorithms. Finally, it discusses the future trends in training methods. The research shows that the synergistic use of these technologies can enhance the perception, analysis, decision-making, and control of the entire training process, significantly improving efficiency, scientific rigor, and intelligence.