“You should always stretch before exercise.”

The long-standing advice to vigorously stretch before exercise has been a cornerstone of fitness routines for decades, often passed down from coaches and physical education teachers since the 1970s. This common practice, often seen in movies and sports montages, became a ritual based more on observation and tradition than on scientific evidence. Early athletic training often assumed that seeing elite athletes limber up before an event meant static stretching was the secret to preventing injuries and improving performance, leading to its widespread adoption without critical examination of its actual impact on the body.

However, modern scientific understanding reveals a more nuanced picture. Research indicates that static stretching—holding a stretch for an extended period—before a workout can actually be counterproductive. Studies have shown that static stretching can temporarily decrease muscle strength and power, negatively impacting athletic performance in activities requiring explosive movements. Furthermore, the belief that static stretching significantly prevents injuries has not been consistently supported by evidence; some studies even suggest it may cause microscopic tears in muscle fibers. Instead, dynamic stretches, which involve controlled movements through a full range of motion, are now recommended before exercise. These movements effectively increase blood flow, activate muscles, and improve mobility, preparing the body for physical exertion and potentially reducing injury risk.

The persistence of the myth likely stems from its intuitive appeal—it feels logical that making muscles "looser" would prevent tears and enhance movement. This traditional viewpoint, combined with a lack of distinction between different types of stretching in popular advice, allowed the practice to remain entrenched for many years. While static stretching certainly has its place, it is most beneficial after a workout to improve overall flexibility, aid in muscle recovery, and reduce stiffness, rather than as a pre-exercise warm-up.