flexing machine

Strength tests using the elbow flexing machine confirm this.

With her leg bound up in the flexing machine and with as much pain as she got when she moved her knee, she was totally dependent on the nursing staff.

I like to go places and do things, but instead I am locked down, my left leg and brand new knee strapped into an electric flexing machine six hours a day, bending, straightening, bending, straightening.