Yoga Posture - Plank Pose

Hold for 10-20 seconds.  Focus on making straight lines -- arms perpendicular to the ground.  I have to do this one on my knuckles because I have a bit of carpel-tunnel, but you should have your hands open on the ground -- fingers spread with your middle fingers pointing straight forward.  You should be on the balls of your feet.

You'll be amazed at how many muscles are used for this simple looking pose!  It will tone your arms, pecks, abs, back, caboose and legs.  That's, pretty much, everything!  See how long you can hold this one.

This will be a tough one for you if you have lower back problems.  If you feel too much stress on your lower back (pain during or after), just do it on your knees.