its important to hold the posture during the plank or it will have no effect or even the opposit effect. A good goal is 3 to 6 seconds. When you get stronger ma

its important to hold the posture during the plank or it will have no effect or even the opposit effect. A good goal is 3 to 6 seconds. When you get stronger make it harder by lifting one leg, put the support leg on a ball, and do it sideways.