Yes, losing five pounds in a week is possible, and the higher your starting weight is, the easier it will be. However, if you haven’t been losing weight for a period of time already, then some ...

"Typically, by 40, you are gaining about five pounds of fat and losing five pounds of muscle every decade," she explains.

Sure, it's fully above-board to order add-on weights in five-pound increments (which, side-note, I love so much more than a 10-pound jump). However, going beyond 60 pounds isn't sanctioned by REP.