Every autumn, as athletes return to training after summer, many face muscle soreness, tendon injuries, and conditions like plantar fasciitis. These issues often arise due to the sudden increase in physical activity after a long break. A sports traumatologist in Spain emphasized in October 2026 that these injuries are largely preventable with a more measured approach to resuming physical activity. When people return to sports after a period of inactivity, their muscles and tendons are not immediately ready for the demands of training. This applies to both seasoned athletes and newcomers, even during their first sessions. The initial return to training often involves muscle groups that are still weakened, leading to cramps and intense soreness in areas like the calves, quadriceps, and hamstrings. Tendons in the Achilles, patellar, and rotator cuff regions can also develop tendonopathies, while the lower back, knees, and ankles may become painful. The main cause of these injuries is not necessarily incorrect movement, but rather an overload on the body. Juanjo López, a sports traumatologist and physician to tennis player Carlos Alcaraz, explained in early October that muscles, tendons, and joints are often unprepared for the sudden increase in stress. Without regular training during the summer, the body's tissues lose their ability to withstand physical demands. When individuals push themselves too hard too soon, their bodies can't keep up, leading to injury. To prevent these issues, a gradual return to training is essential. Two to three weeks of transition are typically enough for the body to readapt. During this time, the frequency of sessions should increase gradually, as should the intensity of the workout. Exercises that target the entire musculature with proper technique are more effective than isolated heavy movements. An active warm-up, which involves movement rather than just stretching, helps prepare joints better by raising muscle temperature and improving tendon lubrication. Mobility exercises at the start of a session also help muscles and tendons handle the workload. Skipping these steps can lead to direct strain on muscle fibers. Recovery is just as important as the training itself. Rest and proper sleep allow tissues to heal and adapt. This "invisible training" is crucial because without it, micro-injuries may not heal properly, leading to a buildup of fatigue. Additionally, the soles of the feet contain many sensory receptors that help the brain understand body position and balance. Shoes with overly thick or rigid soles can isolate these sensors, reducing stability and increasing the risk of improper movement during strength training. In contrast, shoes with thin, flexible soles allow for better ground connection, promoting natural foot movement and improving balance and posture during workouts.