And we're going to go down to the floor for crunch. If you can ... If you have more than one medicine ball, you might find that you want a lighter one for some exercises and a heavier one for ...
Looking for the best exercise ball to boost your home workouts? Here's everything you need to know, including the ideal size, how to use them and which to buy.
We're going to use an ab ball and a floor mat. Make sure you have enough room to spread out. Let's start with a waist crunch. Have a seat on the exercise mat. Now, what I want you to do is lie back.