That vertical thing? Yeah, not so much

Dear Adam,

I need to have a word about your little plan to get more exercise by always taking the stairs rather than the escalator when exiting the T station. I'm not saying it's a bad plan—on the contrary, it seems to be quite effective. I'm just saying that maybe your plan ought to include a Porter Square exemption. Just a thought.

Yours in pain from the knee down,
Adam