31/08/2026
Mobility Monday: Shoulder Internal Rotation 🌀
When we talk about shoulder mobility, overhead range usually gets all the attention.
But internal rotation is an important piece of the puzzle, too.
In Functional Range Conditioning (FRC), we’re not just trying to get more range of motion. We want to develop the strength, control, and capacity to actively use the range we already have—and gradually expand it when appropriate.
That’s where PAILs & RAILs come in.
🔹 PAILs — Progressive Angular Isometric Loading
We progressively load the tissues on the outside of our current range. Think of it as teaching your body, “Hey, we can produce force here.”
🔹 RAILs — Regressive Angular Isometric Loading
Then we use the muscles on the inside of the range to actively pull ourselves further into that position.
The goal isn't to force your shoulder into a bigger stretch.
It's to create more usable range that you can actually control.
And that distinction is important.
Passive flexibility ≠ active mobility.
Being able to get somewhere is one thing.
Being able to control and produce force there is another.
That’s what we’re training. 💪
So the next time you’re working on shoulder mobility, don't just ask:
“How far can I go?”
Ask:
“How much of this range can I actually control?”
As usual, the video is sped up.