Learn how to properly perform the ball exchange exercise to tone and strengthen core muscles in this free exercise video on core muscle toning.
Expert: Riki Butler
Bio: Riki Butler graduated from the University of Florida with a B.S. in Health Science Education. She is a certified personal trainer and group fitness instructor.
Filmmaker: Michael Carter
Is it true that you can do this with a pillow?
Anameleth13 1 year ago
she's fine :)
ThePoPolitickinShow 3 years ago
thanx
63266 3 years ago