She has to have assistance up and down stairs to the podiums and a chair or stool to sit on before and after she speaks.
She is frail.
I don't go along with the speculation that she's had a seizure every time a photo or a video surfaces showing Hillary with a goofy look on her face. Still, I do believe she has some ongoing physical problems. A while back, the media was barred from filming her climbing the staircase to enter her plane after a campaign appearance. Why ban them from filming something as mundane as that unless it would have been apparent that her physical condition is something that could be a source of concern for the voters?
And yet, in a recent puff piece on the candidates health, they claim she likes to take "brisk walks".
Looks to me like that amounts to about 5-6 steps.