ATHLEAN-X's AX-1 Training System is built on MECHANICS YOU CAN SEE AND FEEL, so you can workout with confidence and train smarter. Jeff Cavaliere is a trusted physical therapist and strength coach who has helped millions of people transform their lives through his fitness videos on YouTube @ATHLEAN-X. AX-1 is a complete 12-week program with in-depth videos to guide you, a daily training calendar, and sets rep tracking. What you get with a ONE-TIME PURCHASE of the AX-1 training system: - LIFETIME