this is an awesome website run by two certified personal trainers & nutritionalists. printable workout plans, short but effective workout videos, lots of great recipes, a printable monthly calendar of fitness goals.
On the Ball: 3 Exercises to Tone your Tush One of my favorite exercises with an exercise ball. Very effective! For an extra challenge try doing it with one leg at a time. Sets of 10 on each leg is a good place to start.