Who doesn’t dream of transforming their body in just four minutes? At first it looks too good to be true, but this position actually works wonders to strengthen your core and tone your stomach muscles.
Sit-ups are a thing of the past; they’ve been replaced by a newer, more effective exercise to strengthen your core.
We’re talking about the plank. Not only are planks healthier for your back, they are also much better for your abs—as most people who’ve tried them agree.
Check out the 4 minute a day challenge on the next page…