The body
The shoulder's muscles, tendons and ligaments. Drag to turn it, tap a structure to read about it, and slide the model through a strict pull-up to see what lengthens and what shortens.
View:
A schematic model: positions and shapes are simplified to show what attaches where and what moves together. It is not an anatomy atlas, and both shoulders always move the same way.
Muscles, tendons and ligaments
Each has a page: where it runs, what it does, and the drills that work it.
Test your recall: a free eight-question shoulder anatomy quiz →
Print it: a free pull-up muscles diagram with eight muscles labelled →