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Today we’re covering an exercise that will turn your legs into pistons, render your core solid as steel, and make your grip a vice.

Michael did it to prepare for his 33-day expedition into the Arctic, and he recently placed it back in his routine to get ready for an upcoming backcountry hunt.

It will improve your rucking, running, hiking, walking, cycling, lifting, and your ability to do “life stuff” like carrying kids and gear.

It may also make you live longer. Stronger legs and grip are two of the best predictors of longevity.

For video of the exercise and tactics on how to do it well, visit TWOPCT.com.