The Playbook
Performance nutrition, sourced.
Physician-written and physician-reviewed. Every claim traced to the research. Two board-certified doctors on the topics that actually move an athlete forward.
Petersen's Playbook
Erik Petersen, DOSeptember 28, 2026Petersen's PlaybookDr. Erik Petersen, DOJuly 15, 2026Carlson's Corner
Dr. William Carlson, MDJuly 8, 2026
Sleep Is the Cheapest Performance Gain Your Athlete Is Skipping
For teen athletes, eight or more hours of sleep lowers injury risk and sharpens performance more reliably than most supplements. Here is what the evidence shows and what to change tonight.
Erik Petersen, DOSeptember 28, 2026Creatine for the High-School Athlete: What the Evidence Actually Says
It's the most-studied supplement in sports and the one parents worry about most. Here's the honest, evidence-based answer on safety, dosing, and whether your athlete needs it.
Dr. Erik Petersen, DOJuly 15, 2026How Much Protein Does a Growing Athlete Actually Need?
Forget the shaker-bottle marketing. The research points to a clear target — and to something most athletes get wrong: not the amount, but the distribution.
Dr. William Carlson, MDJuly 8, 2026