I cannot sit for more than 30 minutes at a time and driving around usually uses up my upright sitting. Ironically, I do deliver meals on wheels 1 day a week (I need the next day off to recoup) The total trip-to the senior center, delivery the meals, back to the senior center, and then home takes about an hour and 1/2 but it's not all sitting or all standing. But, I am wiped out after that and need to recline for a couple of hours to decompress.
I also cannot stand for very long but laying around is BORING! and I wanted to be able to do something and give what little I could.