weight lifting belt

A stiff, 15–20-cm wide belt worn around the waists of those who lift heavy loads as part of their usual employment activities or during participation in certain sports

weight lifting belt

Back belt, see there.
References in periodicals archive ?
An evaluation of a weight lifting belt and back injury prevention training class for airline baggage handlers.
It doesn't matter if you have a so called "weight lifting belt" on, it will not support you if your lumbar is compressed.
The court heard that four weight lifting belts arrived in April 2011, addressed to somebody called Mr Cameron.