http://www.reddit.com/r/Fitness/comments/1ewxhk/how_often_do_lifters_use_butt_plugs_while_doing/ Прям даже и не знаю.
Комментаторы жгут, кстати:
I've been lifting heavy for 30 years now, and it's amazing how much has changed around the gym. When I was in college (1980's), the spotter would always give the lifter 'the bung' by applying anal pressure with his index finger until the set was finished. We didn't need any fancy equipment back then, and I know a few guys who still use this method (myself included).