Why are mountain climbers so hard?

Plain and simple, a weak core will make it extremely difficult for you to perform mountain climbers correctly, says Tripp. Essentially, the mountain climber is just an active plank. So, if your hips and midsection are sagging, and your knees are banging against the floor, nailing the move will be nearly impossible.

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What muscles do plank climbers work?

Considered one of the most intense exercises, mountain climbers work numerous muscles including the abdominals, glutes, legs, triceps, chest and shoulders . “You’re holding a plank position so your core is engaged, as well as your triceps, chest, and shoulders,” personal trainer Jess Sims told SELF.25 Ara 2021

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