Originally Posted by 5kgLifter
I have read about that issue, previously. Can you access this link?
Look hot, live long: the ... - Christine Lydon - Google Books
It doesn't give much info, but it does highlight anything below 80% of 1RMs should be done with no belt if possible and to remove the belt between sets; both of which you probably do. It also highlights that the belt restricts movement in L4-L5 area of the back etc. It may be of some use to you.
Thanks for the link. I don't know off the top of my head what percentage of my 1 rm my 5rm works out to. I do know it feels heavy enough to me that I feel the need for the extra support when deadlifting.
I always remove my belt when not in use and only use it on the heaviest set.