Built by coaches. Used by 250,000 athletes.
Our mission is to make principle-based strength coaching available to every lifter.
Our story
Backed by science, not guesswork.
2009
Founded on coaching
Chad Wesley Smith founded Juggernaut Training Systems to make sound training principles available to anyone willing to put in the work. Through articles, seminars, and coaching around the world, Juggernaut helped lifters from their first meets to world championships.
2018
Built by lifters
Tim Arnold joined Chad and later became JuggernautAI’s technical co-founder. Together, they brought Juggernaut’s coaching methods into an app, combining experience on the platform with decades of design and development.
Today
Coaching that grows with you
JuggernautAI builds a program around your goals and adjusts it as you train. The same periodization, auto-regulation, and weak-point analysis our coaches use now guide your next session, training block, and competition.
Meet the team
Chad Wesley Smith
Founder & coach
An international powerlifter with a raw total over 2,000 lb, Chad founded Juggernaut Training Systems in 2009. His experience as a lifter and coach shaped the training principles behind JuggernautAI.
Tim Arnold
Technical co-founder
Tim joined Chad in 2018 and wrote JuggernautAI’s code, bringing decades of design and development experience. His own time under the bar helped shape an app built by lifters, for lifters.
Marisa Inda
Head coach
A 2017 IPF world champion and multiple-time USAPL national champion, Marisa brings experience in powerlifting, gymnastics, and bodybuilding to her coaching.
250,000+
athletes coached
2009
founded by Chad Wesley Smith
300+
exercises with video coaching
4.8
App Store rating
What we believe
Principles over programs
Your training follows a plan built around your goals, experience, and schedule. Periodization and fatigue management shape the work you do in each phase.
In the app: training blocks build through hypertrophy, strength, and peaking as you prepare for a meet.
The lifter is the data
Your feedback changes the plan. Readiness checks and the sets you log help the app adjust your training to how you are recovering and progressing.
In the app: your sleep, nutrition, and recovery check-in adjusts the day’s training.
Strength is for everyone
First-time competitors and world champions use the same coaching principles, with different programs. Your experience, availability, and goals shape yours.
In the app: choose from 2 to 6 training days a week to fit your schedule.