First Principles Training by Jack Farlow

First Principles Training is a CrossFit program built from science. Not guesswork like traditional CrossFit programs. Every training decision is grounded in exercise physiology, periodization research, and the methods used by the best athletes in CrossFit and other elite sports.

The program is structured around progressive training blocks that develop all three energy systems while systematically building strength, gymnastic capacity, and your engine. Each block has a clear target, progress is tracked and measured, and nothing is programmed without a reason.