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Core Exercises for Runners: One-Legged Crunches

It's good to mix up your workouts and keep your muscles guessing. The one-legged crunch is a good example.

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It’s good to mix up your workouts and keep your muscles guessing. The one-legged crunch is a good example of a core exercise that’s a little different from the norm.

This video breaks it down further. Do 2 sets of 10 with each leg.

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