ExRx.net vs Trainerize
Two tools coaches often weigh against each other, compared on the same terms.
ExRx.net
A long-running exercise encyclopaedia with muscle-by-muscle indexes, kinesiology notes and instructions — a reference library rather than a coaching app.
Trainerize
An all-in-one online coaching platform — build workouts, publish them to a branded client app, track progress and message clients in one place.
Pricing
ExRx.net: Most of the library is free; some sections require membership
Trainerize: Tiered by active client count; free trial
Category
ExRx.net: Fitness
Trainerize: Fitness
Topics
ExRx.net: Exercise Library
Trainerize: Workout Planner, Progress Tracker, Exercise Library
Last checked
ExRx.net: 2026-09-16
Trainerize: 2026-09-16
What it is
ExRx.net
An old-fashioned, deeply indexed exercise directory: pick a muscle, get every exercise that trains it, with mechanics, joint actions and instructions. It looks like it was built in 2003 because much of it was, which is not a criticism.
Trainerize
The category's default answer. You build programmes from an exercise library with video, assign them to clients, and they follow along in a phone app that also handles check-ins, photos, body stats and messaging.
Best for
ExRx.net
Checking your own understanding before you prescribe something, and finding regressions or variations when a client cannot perform the obvious movement.
Trainerize
Coaches running a book of online clients who want one system rather than a spreadsheet, a video folder and a WhatsApp thread.
Watch out for
ExRx.net
It is a reference, not a programme. The presentation is dated, and some of the deeper material sits behind a membership.
Trainerize
Pricing steps up with active clients, so the maths only works once you are charging properly. The workout builder is powerful but fiddly — budget a weekend to build your template library before your first client sees it.
Editorial comparison — nothing here is paid placement. Pricing changes often; treat the vendor’s own page as the truth. How we review