Moderate exercise like walking, pull-ups, push-ups, air squats, or climbing stairs can provide adequate stimulus for muscle maintenance.

“you could just walk you could probably do five pull-ups a day you know or or 30 push-ups a day or 20 air squats a day that that's probably I mean people are gonna go crazy for this and climbing stairs like trying to do mostly concentric exercises yeah climbing the stairs at your office could be you know a really reasonable stimulus”