Tokyo Olympics 2021

Definitely heard this linked with Team GB track sprinting alongside voodoo like eccentric sprint training on an erg you pedal backwards on

I listened to an interview with Jack Nowell (England rugby) saying when he was injured he was doing a bit of restriction training in his home gym and got told off by the team staff as it was getting him too big in the areas he was going (I assume arms) and not achieving much. Must work though I’ve never tried it

Its growing in popularity- amongst physios for rehab predominantly at the start.
Quite interesting.

I've not read the article, but I'm going to assume it involves compression rings supplied by Doc Johnson

This is why I use uncomfortable saddles.