Actually, you don’t 
You just need to go to a big empty space and augment it! That’s the magic of this approach, you can interact with reality rather than trying to simulate it in ways that will always fall way short, y’know?
That being said, there’d definitely be a big benefit to having various extensors attached to the exoskeleton in the long term, and one of those treadmill things would be a fun short-term middle ground for people who live in really crowded spaces or don’t want to bother leaving home.
Professor Kaku actually talked about it a bit more in-depth in one of his discussions . .and he was SOOOO close to the real wearable holodeck!
