Most planks are static, meaning, you just hang out in a basic plank. Not this plank. Instead, there is a dynamic component to it in that you will be timing the transitions and throwing your balance off
By K. Aleisha Fetters, DETAILS (photos: Getty) Take a look around your gym: There's no end to the array of abs exercises that guys are churning out. Their bodies are contorted. Their foreheads are drenched.
With one kettlebell and enough room to swing it, you can get an awesome metabolic workout A new study in the Journal of Strength and Conditioning Research shows that the length of workouts doesn’t matter.