Christian Marchegiani

Christian "Mack" Marchegiani has spent more than twenty years helping people get stronger, fitter and tougher, in less time than they ever thought possible.

He holds a Bachelor of Exercise Science, a Master of Sports Science and a Diploma of Education (Biology). In 2003 he founded THUMP Boxing in Sydney's Inner West. Since then he has trained NRL and AFL players, cricketers, Olympians, school athletes and thousands of everyday people. He has appeared on the covers of Australian Men's Fitness and ultraFIT.

Mack's approach is High Intensity Resistance Training (HIRT): brief, hard, safe sessions built on a few big exercises, real effort and steady progress. No gimmicks, no two-hour workouts, no fads. Just the methods that have worked for his clients in the gym for two decades, explained in plain English.

He is the author of the HIRT Library:

The Complete Guide to High Intensity Training

52 Exercises & Why You Should Do Them

Total Strength, Total Fitness

The 12-Week Superset Program

He is also the founder of Rebel Fitness League, an online global strength federation. It ranks men and women on three lifts, a bodyweight test and a three-minute cardio output.

Mack believes being physically strong is the foundation for handling whatever life throws at you. His books are written to help you build that strength, one honest rep at a time.