Watch Gunnar Peterson's Core Secrets: Ab Assault (2003)

Gunnar Peterson's Core Secrets: Ab Assault

A strong body starts at the Core! Work this problem area with Core Secrets Ab Assault. These powerful isolation and core-shaping moves are Brooke's secret weapon for keeping her abs flat and in top form. Brooke demonstrates proper positioning as Gunnar challenges and encourages you through every set. Follow the routine three times weekly for flat, firm abs.