It can be hard to understand how much is too much. Especially, when it's not you and the person you're trying to be there for is experiencing something you can't fathom.
N and I, have to focus and pay close attention to Fran's schedule and every activity or else her body will make her suffer the following 24 -48 hours. Every minute she sits up, whether it's in the car, in her chair, in the kitchen or in the shower, takes a toll on her. I try to make sure her outings are as frequent (every other day or so) as possible, but also less than an hour. Yeah, an hour a day is about the right amount. She'll try, under certain circumstances, to participate for much longer than an hour (over an entire day), but as I mentioned earlier - it's too much and her body will punish her.
So, we're learning to pay close attention to the clock ALL the time, because being a little bit active every day is better than being wiped for three days after being way too active for one day.