SINOPSIS DEL LIBRO

<p>YOUR BEST ABS is revolutionary in its approach, but the research behind its benefits has been around for years. The premise is simple: Train the abs as they are designed to work, not by doing crunches and sit-ups, but by properly bracing the core using core isometrics. The purpose of the abs is to resist spinal extension?to brace and hold, not to push and pull. Your Best Abs provides a way to sculpt the abs without damaging the lower back or a...Seguir leyendo