Reach overhead on the straps and dare your core not to sag.
Keep ribs down and hips locked, do not let your low back arch as you reach.
The fallout is anti-extension in its purest strap form, arms drifting overhead while your core fights to keep the ribs down and the lower back flat against a lever that gets longer every centimetre. Nothing rows, nothing presses, the abs simply refuse to let you fold at the spine as your body angle drops. It earns its place as the standing cousin of the ab wheel rollout, easier to scale because your foot position decides exactly how brutal it gets.
Same principle, friendlier tool. The straps let you set difficulty by foot position and bail out safely, which a wheel does not, so fallouts are the smarter place to build the pattern.
Go to the point where your core is working hard but your lower back has not arched a single degree. Arching is the failure signal, stop short of it every rep.
Walk your feet further back so your body starts at a steeper angle. A small foot adjustment adds a lot of load, so progress in small steps.
