Do The 30 Day Plank Challenge Plank exercises are some of the overall best exercises you can do to strengthen your entire core. And keep in mind, your core includes a whole lot more than just your abs. How to tone you up your body in just a month? Planking is a full-body workout and you can transform your body in less than 5 minutes a day just by planking. Perfect your plank (or learn to hold one for the first time) to tone your middle and boost your balance and posture in just 30 days. A st