Want to work your abs with a yoga ball? We turned to an expert to walk you through the best moves to do—and how to do them.

We are moving now to knee tucks. Some people call them jackknife ... Well done, 10-minute stability ball exercise. Now don't forget to cool down and stretch it out a little bit, all right?

And now I am going to demonstrate an exercise you can do for your upper ... walk yourself all the way out until the ball is on your knees and shins, put your hands a little wider then shoulder ...

Squats are a cornerstone of any fitness routine, renowned for their effectiveness in strengthening multiple muscle groups. However, many people worry about their impact on the knees. Fortunately, ...