You can soak your feet about half an hour after exercise, but use warm water. Generally speaking, local muscle soreness and vasodilation will occur after exercise, so it is not recommended to soak your feet immediately. First of all, it is suggested to rest and sit still, lying flat and raising the lower limbs, which is beneficial to blood return and circulation. After about half an hour, you can soak your feet with warm water. For local muscles, massage or physical therapy can relieve fatigue and promote recovery. Don't be too strenuous or excessive when exercising, and pay attention to avoid sports injuries.