Lou Schuler
Lou Schuler, CSCS, is a National Magazine Award-winning journalist and editorial director of the Personal Trainer Development Center. A lifelong gym rat (he joined his first health club in 1980), he’s contributed to Men’s Health for more than 20 years, and is the author or coauthor of many popular books about strength training and nutrition, including the six books in the New Rules of Lifting series, with Alwyn Cosgrove.

The Hard Truth About How Much Muscle You Can Really Gain – and Why It’s Not the Same for Everyone
Here’s what science says about genetics, training and why results vary wildly
07 April 2026

Why This Weight Loss Doctor Says ‘Eat Less, Move More’ Is Awful Advice
A physician pushes back against simplistic ideas about diet and exercise
23 September 2019