The Belly Buster works lower back and abs
The belly buster is another good core exercise, because it works two troublesome areas:
the lower back and the stomach muscles. This is a good exercise to use at the end of your
routine when you are inclined to cheat a little and rest a bit longer between stretches.
Lay on your back, your arms at your sides. Raise your toes to transfer any pressure from
your feet and pretend you are trying to push your belly button through the ceiling. Hold it
for a count of ten and repeat five times. As you become more comfortable, increase the
duration and/or number of repetitions.
As with the other exercises I've described,start out slowly and build up to a comfortable
level for you. As you can see, this is another exercise you can do anywhere, so find a
comfortable spot and get to work.