Jock Joints
Mobility · taught live by Mike Jock

You can be pushed further than you can hold.

Someone can lift your arm higher than you can lift it yourself. That extra stretch isn't strength — it disappears the second they let go. This class trains the part you keep.

Shoulder range, drawn as a moving arm A simple arm pivots at the shoulder. The solid line shows how far it can be raised under its own power. The dashed line shows how much further someone else can push it. The shaded wedge between them is the range that cannot be held.
Yours — held Pushed — not held
You hold165°
Pushed to180°
Not held15°

Typical textbook figures, shown so the gap is visible. Not a measurement of you — yours gets taken in your first class.

The class 45 min · live · no equipment

Every class runs the same three steps.

Live on video, once a week, on your own floor. Mike scales any position down on the spot if it isn't yours yet.

Step 1 — Find
The arm stops where you stop it

Find your real edge

Move the joint as far as you can on your own, before anything is warmed up. Whatever you reach unassisted is the honest number.

Step 2 — Work
Small movements at that edge

Work the weakest spot

One direction at a time — the one that ran out first, not all of them at once. Order is most of the method.

Step 3 — Hold
Ten seconds, nothing holding you

Hold it yourself

Push hard against nothing, at the position you just found. That effort is what turns a stretch into range you keep.

This is Kinstretch, in one line

A class that trains your joints to move through their full range under their own power — closer to strength training than to stretching.

Read the longer answer
The library Building now

Every class comes apart into clips you can look up.

Each class is recorded whole, then cut into single movements and filed by joint — so one clip can answer one question. Nothing has been filmed yet. Every square below is empty, and stays empty until the classes that fill it have actually been taught.

221 movements mapped · 0 recorded
Mapped movements by joint
JointShare of the library MappedRecorded
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