Articles by Justin Fassio

ACSM Certified Personal Trainer and Military Fitness Expert with over 30 years of experience in exercise science and tactical physical readiness.

2 articles

Fitness Technology

Why 'Random' Workouts Kill Progress (and How to Fix It)

Stop 'confusing' your muscles and start growing them. Learn why the SAID principle trumps random workouts and how to use progressive overload for real results.

Justin Fassio January 14, 2026

#Progressive Overload #Training Science #SAID Principle +1 more

Fitness Technology

The Problem with AI Hallucinations in Fitness Data

Generic AI chatbots often invent dangerous exercises. Learn why 'hallucinations' happen in fitness data and how our trainer-verified engine prevents injuries.

Justin Fassio October 22, 2024

#AI Safety #Hallucinations #Fitness Data +1 more