Muscle growth and stretch marks
Guide to stretch marks in fitness training: The speed and intensity of a training program can also contribute to the formation of stretch marks. Beginners who start lifting weights and quickly progress to heavy loads may experience rapid muscle growth, especially if their bodies are responding strongly to new stimuli. This sudden change can overwhelm the skin’s ability to adapt, leading to tearing beneath the surface. Similarly, advanced lifters who dramatically increase training volume or intensity in a short period may encounter the same issue. Progressive overload is essential for muscle development, but when applied too aggressively, it can have unintended consequences for the skin. Gradual increases in training intensity allow both muscles and skin to adapt more effectively, reducing the risk of stretch marks while still promoting steady gains…

