### Instruction: what are the benefits of swimming?
### Response: Swimming is a gravity-free, full-body cardio workout; swimmers can determine the intensity of the workout on their own with different exercise strategies. Swimming can improve your cardio level, get better heart-blood circulation, and have stronger lungs. Like any other sport or exercises, swimming also reduces stress, boosts mood, and helps with sleep quality. If you swim fast pace sprints, it can build muscles. On the other hand, if you swim steady-paced, long laps, it improves endurance and reduces your resting heart rate with practice.