No duh, many are from the same workout, look at the transitions between different types of pushups, or the stairway, which is harder to do than the one arm push up. Dude is on another level than doing arm pushups.
you are fooling yourself the stairs is the same as a feet elevated pushup on a chair or countertop , maybe you want to do some pushups yourself
the body is a high performance engine like a car, it needs a little oil in the form of olive oil, thank me later stud