Level Up Your Plank Workout: 11 Planks to Build Core Strength

When you were a kid, you probably did sit-ups for an ab workout. But is the sit-up the best ab exercise?

Source: Level Up Your Plank Workout: 11 New Planks That Build Core Strength

A lot of it is just variations that keep you in the same position – arm raises to the side or in front, the effect on the body is the same.

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