4. Arctic Enema
Forget ice baths for post-workout muscle relaxation. This frigid ice dumpster will shock your muscles into tense bricks. But suck it up, poise, and dive into this arctic-temperature ice pool. Battle your way to the surface and swim through the chunks of ice under a huge wooden plank. Pull yourself out as fast as you can before hypothermia sets in.
Hint: Once on the other side, take a minute and warm up with a few jumping jacks or push-ups. Give your muscles a good rubdown before you take off. This is important because you don’t want to go into shock or push it too hard. There are many obstacles ahead, play it smart.