Hi, Colleen. Thanks for writing. I knew I hadn't explained myself well. Often late in the day, or after I've been sitting for a long time, when I stand, I'll be wobbly, needing to touch some stationary object, such as the wall or a desktop to avoid feeling that I might fall. At these times, my legs will feel "rubbery," and my knees too, like they cannot support me. I've been calling this sensation "weak." When I've used that term with my doctors ("weak"), they'll often test my legs ("resist my pushing your leg down," "try not to let me pull your foot up," etc.). I'll be told, "Your legs seem plenty strong." That's what I find puzzling. If it's not a weakness, what then? I would welcome any thoughts you might have. ––Ray