Move: Lying facedown on the floor, place your hands under your shoulders, tucking your toes underneath you. Push up into a plank. Keep your abdominal muscles lifted up toward your spine. If this is too difficult, drop your knees to the floor, modifying the push-up. Have your hands pointed slightly inward. Lower yourself toward the floor, trying to achieve about a 90 degree bend in the elbows. Exhale as you press back up. Repeat with the left leg lifted.
Repetitions: 12 on each side.
• Keep your abdominal muscles contracted. Knitting your rib cage together will help to keep the lower back from sagging.
• If your core is weak, you may need to move to a modified push-up because the push-up from your toes is more difficult not only for your chest, arms and back but also for your core. If your back is not straight, your rib cage cannot stay knit together. If you feel any discomfort in your lower back, modify the push-up by dropping down to your knees.