The Atlantic Ocean is a turquoise blanket unfurled to the horizon beyond the white sand beach of the Grace Bay Club, a luxury resort in Turks and Caicos. My husband, Adrian, and I haven’t traveled as ...

For most of us humans, the aquatic dance is the same. We dive into a pool or a lake or an ocean, perhaps hold our breath for a few seconds as we swim underwater, and then surface to blessed oxygen.

When it comes to training, many of us spend a fair amount of time devoted to designing the exercise routine itself (like how to get that extra pump on chest day), our form, gear, and recovery. One ...