The action in trotting is generally low, but the bending of the knee and the flexing of the hock is smooth, free and true.
It was flexible and moved with her when she tested it by flexing or releasing her forearm muscles.
The separation of the heavier plates of chitin by grooves of delicate cuticle results in the hinging or jointing of the body and its appendages, and the consequent flexing and extending of the jointed pieces.
These investigators began their work in 1900, and at an early stage introduced two characteristic features - a horizontal rudder in front for steering in the vertical plane, and the flexing or bending of the ends of the main supporting aeroplanes as a means of maintaining the structure in proper balance.
He wore jeans that hung around ripped hips and hugged flexing thighs, the sight of which made her fan herself as she almost let herself imagine them wrapped around her.
I don't know if he's going to try Saturday or if he's just flexing his muscles.
They move by flexing their bodies.
These assist in elevating, and, when necessary, in flexing and elevating it.