NinjaMom
Cathlete
While working on my 1 rep max testing, I decided to try a plastic lid from an ice cream pail. I took a piece of wax paper, buffed up the side that touched the carpet (did this as a kid to make my slide slippery) and it worked very well. The lip around the lid helped to keep my foot slipping off. Just thought I'd share in case you don't want to use paper plates or pay for gliding discs.
JJ
JJ