Couldn’t make it to the gym? Grab your mat and work out your upper abdominals and side obliques. Lie flat on the floor with your lower back pressed to the ground (pull down your abs to also target your deep abs). Put your hands behind your head. Bring in your knees toward your chest, and lift your shoulder blades off the ground. Straighten out your right leg to about a 45-degree angle to the ground while turning your upper body to the left, bringing your right elbow toward your left knee. Make sure your rib cage is moving and not just your elbows. Now switch sides, and do the same motion on the other side to complete one rep. Perform 25 reps.