Stability Ball

-Now, we're gonna work our abdominal muscles and probably the best piece of [unk] medium to do that on is a stability ball. Lia is gonna lean back and she is gonna bring a plate to her chest. This is gonna help to make the exercise even more difficult. She's gonna bring her body up and she's gonna have a very small range of motion. The thoracic spine only has about a 30-degree range of motion. She comes very smooth and the further back she is off the ball, the more difficult the exercise. Excellent Lia.