MARTINA'S CHOICE FOR BALANCE AND STRENGTH Tone and condition all the major muscles of your upper and lower body while developing endurance and increasing joint stability with this special selection of Martina’s choice exercises using SPRI’s Original Xertube® and Xerdisc™.

See why these are some of the most popular tools among fitness instructors and personal trainers. Consult your physician before beginning any fitness program. The Xerdisc™ promotes balance and stability that would help in recreational and dance skating.

Fitness level required for this product: Low to medium

Great for: Arms, upper body, stamina building and balance training.

Areas worked: Upper body (pecs and forearms), shoulders, calves, glutes and posterior