Howcast - Learn how to do a lying twist on an exercise ball from certified personal trainer James Rizzo in this home ab workout video from Howcast.

Howcast - Learn how to do an exercise ball jackknife / hands to feet from certified personal trainer James Rizzo in this home ab workout video from Howcast.

Howcast - Learn how to do a side crunch on an exercise ball from certified personal trainer James Rizzo in this home ab workout video from Howcast.

Howcast - Learn how to do an ab crunch on an exercise ball from certified personal trainer James Rizzo in this home ab workout video from Howcast.

Howcast - Learn how to do knee tucks on an exercise ball from certified personal trainer James Rizzo in this home ab workout video from Howcast.

Howcast - Learn how to do a front plank on an exercise ball for six pack abs from certified personal trainer James Rizzo in this ab workout video from Howcast.

Howcast - Learn how to do one-arm alternating sit-ups with a medicine ball from certified personal trainer James Rizzo in this ab workout video from Howcast.

Howcast - Learn how to do super crunches with a medicine ball from certified personal trainer James Rizzo in this home ab workout video from Howcast.

Howcast - Learn which positions will help you handle labor pain during childbirth from childbirth expert Elizabeth Mangum-Sarach in this Howcast video.

Howcast - Learn two relaxation techniques for the ball of the foot from certified reflexologist Chantel C. Lucier in this foot reflexology video from Howcast.

Howcast - Learn how to work the ball of the foot from certified reflexologist Chantel C. Lucier in this foot reflexology techniques video from Howcast.

Howcast - Learn how to do toe rotations from certified reflexologist Chantel C. Lucier in this foot reflexology techniques video from Howcast.

Howcast - Learn how to do the ball change cross from jazz dance expert Liz Piccoli in this Howcast dance video.

Howcast - Learn how to replace violin strings from musician Julie Artzt Becker in this Howcast video.

Howcast - Learn how to draw with depth from professional artist Kevin Kobasic in this illustration and drawing tips video from Howcast.

Howcast - Learn how to do an exercise ball flat dumbbell fly from certified personal trainer Max Tapper in this home chest workout for men video from Howcast.

Howcast - Learn how to do an exercise ball dumbbell press from certified personal trainer Max Tapper in this home chest workout for men video from Howcast.

Howcast - Learn how to do a medicine ball push-up from certified personal trainer Max Tapper in this home chest workout for men video from Howcast.

Howcast - Learn how to do an exercise ball push-up from certified personal trainer Max Tapper in this home chest workout for men video from Howcast.

Howcast - Learn how to do a dumbbell press using a stability ball from personal trainer Brett Azar in this Howcast home arm workout for men video.

Howcast - Learn how to do a dumbbell overhead extension using a Swiss ball from personal trainer Brett Azar in this Howcast home arm workout for men video.

Howcast - Learn how to do the preacher curl using a Swiss ball from personal trainer Brett Azar in this Howcast home arm workout for men video.

Howcast - Learn how to do a seated curl using a Swiss ball from personal trainer Brett Azar in this Howcast home arm workout for men video.

Howcast - Learn how to do a one-arm concentration curl using a Swiss ball from personal trainer Brett Azar in this Howcast home arm workout for men video.