Swimming

Swimming is a form of moving meditation, relieving anxiety, reducing stress, and improving mood. Do what you love. Almost any form of exercise or movement can increase your fitness level while decreasing your stress. The most important thing is to pick an activity that you enjoy. For example, you might try walking, stair climbing, jogging, dancing, bicycling, yoga, tai chi, gardening, weightlifting or swimming.

https://www.mayoclinic.org/healthy-lifestyle/stress-management/in-depth/exercise-and-stress/art-20044469