This is fun in a novel sort of way, mostly because even if you live on the beach at home, these are tough to practice without clear, tropical water. This is a hypoxic workout that big-wave surfers have been doing for decades which involves variations of diving to the sea floor, picking up a rock, using it to keep you down and running with it. The idea is to increase lung capacity. When your body is static you can stay underwater much longer. Exertion uses oxygen, therefore, by putting your lungs through a workout minus air, you’re really expanding those lungs. Some mountain athletes do hypoxic workouts, as well. This is definitely a challenge. You’re not likely going to see a lot of results if you only do it a few times, but it’s a way to mix things up from a morning jog. Just be sure to do it with a buddy—You don’t mess around with shallow water blackout.
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