Core Viewpoint - The article highlights the increasing popularity of marathon running in China, while also emphasizing the potential health risks associated with excessive running, particularly stress fractures and cardiovascular issues [1][4][11]. Group 1: Marathon Participation and Risks - The 2025 Beijing Marathon is set to attract 32,000 participants, reflecting a surge in marathon events across China and heightened enthusiasm among runners [1]. - A case study of a 36-year-old female marathon enthusiast reveals that her monthly running distance of 300 to 400 kilometers led to a severe stress fracture, indicating the risks of high-intensity running [3][4]. - The article warns that long-term running can cause significant stress on joints, bones, and muscles, potentially leading to injuries such as fractures and tendinitis [4]. Group 2: Health Signals and Recommendations - Runners should be vigilant for three critical health signals during marathons: chest discomfort, extreme fatigue, and breathing difficulties, which may indicate serious cardiovascular issues [5][6][11]. - It is recommended that runners maintain a weekly running distance between 25 to 105 kilometers to avoid injury, with a frequency of 3-4 times per week to allow for recovery [8][9]. - Understanding personal heart rate metrics and oxygen consumption is crucial for runners to mitigate risks associated with extreme physical exertion [11]. Group 3: Injury Management - The article provides guidance on managing common running injuries such as side stitches, muscle cramps, and sprains, emphasizing the importance of immediate action and proper recovery techniques [12][16][17]. - For side stitches, adjusting running speed and breathing patterns is advised, while muscle cramps require immediate cessation of running and specific stretching techniques [13][14]. - In the case of acute sprains, the recommended approach includes rest, ice application, compression, and elevation of the affected limb [17].