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Before you begin

This tool helps you identify exactly where your straight arm invert breaks down. You'll need a short video of yourself attempting the movement — even an incomplete attempt is useful.

How to film

Film from the side first — you need to see shoulder, hip and spine position
Also film from the front if possible — catches elbow rotation and body asymmetry
Film a failed attempt as well as your best attempt
Watch in slow motion if your phone allows it
Pause at the point where things fall apart

Work through each section of the kinetic chain in order. Be honest — there are no wrong answers, only useful information.