Modified plank variations

Try these variations on the modified plank:
• Lie on your stomach. Raise yourself up so that you're resting on your forearms and your knees. Align your head and neck with your back, and place your shoulders directly above your elbows. Tighten your abdominal muscles.
• Raise your right arm off the floor (A). Hold for three deep breaths. Repeat with your left arm.
• Raise your right leg off the floor (B). Hold for three deep breaths. Repeat with your left leg.
• For added challenge, raise your left arm and your right leg at the same time. Repeat with your right arm and left leg.