Some benefits from this exercise are:
A toned belly: Planking will help build your deep inner core muscles that lay the groundwork for that six-pack. As your abs become stronger, your mid-section will tighten.
Reduces back pain: planks work for back pain because they strengthen your core, which has the good "side effect" of reducing the back pain.
Flexibility: The muscles around your shoulders, collarbone, and shoulder blades will expand and stretch as will your hamstrings and the arches of your feet and toes.
Improve your mood: Planks help stretch and ultimately relax muscle groups that become stiff and tense from sitting. The tension release that planks provide uplifts your spirit.
Improve your balance and posture: Planking works all the muscles you need to maintain good posture like: your back, chest, shoulders, abs, and neck.
