Plank exercises are effective for abs muscles specifically. Plank Leg jacks exercise is a Plyometric workout that needs to be done carefully as it includes quick and powerful movements. Along with developing the core and lower body muscles these plank leg jacks help in losing weight and burning fats. Plank workout targets your upper body, shoulders, arms, back, spine, lower body muscles, core, thighs and legs. It is a complete body workout to build strength, trim your waist, lose weight and provide stability for regular tasks throughout the day. You can easily reach your fitness goals through perform plank exercise regularly.