Opposite arm & leg superman’s are a great exercise for strengthening your back and activating your core muscles.
Start by lying flat on your stomach with your arms out straight in front of you. Keeping your legs and arms straight, lift the opposite arm and leg off of the ground as high as possible, so that only your torso and pelvis are still on the ground. Hold this for a few seconds then switch sides. Aim for 8-12 reps, 3 sets.
Try it here – get.zova.com