2. Extreme plank : Start in a “desk-excessive” place, together together with your arms and knees on the Ground and your once more parallel to the underside. As soon as you’re feeling secure, delay your legs back behind you in order that your physique varieties a straight line from the highest of your head to your heels. Now activate your core by flexing your stomach muscular tissues. Attempt to maintain this position for a rely of 15 seconds earlier than slowly returning your knees to the ground. Scale back the remainder for the power superset to 60 sec. Perform the …