Yes, you can do all three! If you go swimming, it is actually recommended that you rinse with clean, fresh water to rinse any chlorinated water from your cast. After your swim, allow most of the water to drain from the ends of the cast to reduce your drying time. If you exercise, there will be no issues with perspiring. The material will not be affected by the salts or oils in your body. After sweating, thoroughly flush your cast with clean water. Please note: Avoid swimming in a lake or river with your cast.