The move: Plank walk
Three reasons to do it now:
• You'll be able to go longer. Holding a plank position helps you develop endurance in your shoulder muscles. You'll be able to run and exercise longer without feeling pain or fatigue in the neck and shoulder areas.
• It's a sneaky glute toner. "When your glutes are strong, you won't overwork your hamstrings during squats, lunges, cycling and running," said Michele Olson, Ph.D., an exercise physiologist and creator of the DVD "Perfect Legs, Glutes and Abs." "You want to take advantage of these larger, stronger gluteal muscles to push harder and longer."
• It safeguards your spine. This move trains your abdominal muscles to work cooperatively with your spinal muscles (instead of separately), giving you a strong, resilient trunk when you run and play sports.