08/19/2026
LiVE ARM vs. Isolated Testing
The muscles that decelerate a throwing arm don't work in isolation. So why do we keep testing them that way?
@ArmCare said it well on June 28: when the muscles in front of the shoulder overpower the muscles behind it, the shoulder loses balance. Agreed. @Vald Health is chasing the same signal with force plates and ForceFrame — real technology, real adoption across MLB organizations.
Here's where LiVE ARM diverges: those systems isolate internal and external rotation in non-functional positions. LiVE ARM measures all of the deceleration muscle group together, in the functional position where they're under the greatest stress during a throw. Functional isometric testing has been shown to be the most reliable way to measure muscle function, and it's the foundation of our patented approach.
We're not here to knock the other players in this space. Vald Health and ArmCare are pushing the same mission forward: fewer arm injuries, more athletes reaching their ceiling. But if you're a strength coach, an athletic trainer, a PT, or a pitching coach we want to hear where you land.
Isolated muscle testing or functional deceleration testing under load. Which one tells you more about what's actually happening in an athlete's arm?
Drop your take below.