Feeling Solitude try this

“One of the most fulfilling workouts to do solo is swimming. No more worrying about the heavily breathing person on the treadmill next to you, since water blocks out external noises. Choose your own lane and swim laps for some one-on-one time with yourself without the small talk from passersby. The escape you feel from plunging underwater will be just the kind of tranquility you need when you want alone time, not to mention the work it does on your bod!”

Source: https://www.popsugar.com/fitness/Best-Workouts-Mood-26274487?stream_view=1#photo-26274497