My LO's seem to have a ten minute tolerance for me going for a run with the double stroller... At this point I only run about 1.5 miles before dying, so they're only whining/screaming/complaining for the second half, but I'm wondering if it gets better? We've only done this a handful of times over the past several months, so maybe if it's more of a regular thing?

How are your kids in the stroller for "longer" periods of time?