Start with a slow, comfortable walk before progressing to faster speeds. If you choose more demanding exercise, the warm-up phase should be longer and more involved and include a variety of stretching exercises. At the end of a workout, don't stop abruptly, but rather slow your pace gradually until you quit. Then stretch again. Leave it for weekends.
Many people use sports as a means of getting in shape.
They push themselves on weekends in demanding events like basketball that can stress the body to its limits. Instead, get in shape first so you can enjoy sports safely. This is especially important if you do not participate regularly. No rest for the workout. Vigorous exercise takes a toll on the body, and not resting completely between workouts can spell trouble.