- Werner U. Spitz, Daniel J. Spitz
Strong Curves: A Woman's Guide to Building a Better Butt and Body
This is not your run-of-the-mill fitness book. Developed by world-renowned gluteal expert Bret Contreras, Strong Curves offers an extensive fitness and nutrition guide for women seeking to improve their physique, function, strength, and mobility.
Contreras spent the last eighteen y















