MEET
MATTHEW CATHER
(COZMO)

Founder of CozmoSize Fitness · Creator of the Longevity Strength System

Matthew Cather founded CozmoSize Fitness to bring a higher standard of training to everyday adults, built on the same principles used in real strength and conditioning programs. With over 20 years of full-time, hands-on coaching experience, he has worked with hundreds of individuals, from beginners to experienced lifters, helping them build strength, improve their bodies, and stay consistent long term.

His approach was shaped during his time playing football at College of the Canyons, where he was introduced to structured, progressive strength and conditioning under elite-level coaching. After years of coaching and seeing the gaps in the fitness industry, Matthew developed the Longevity Strength System: a structured, strength-first system designed to help adults build muscle, reduce body fat, move better, and stay consistent for the long term.