Plank
Lie on your stomach and prop your body up on forearms and toes and maintain a straight spine. Keep your chin tucked in. Do not let your lower back arch. Hold this position.
Lie on your stomach and prop your body up on forearms and toes and maintain a straight spine. Keep your chin tucked in. Do not let your lower back arch. Hold this position.
Subscribe now to keep reading and get access to the full archive.