Never counted ... since I learned to stand up...8 decades ago ... because Movement is Pleasure.
Strange what we did out of our inborn impulse/instinct, grows so rusted as we grow old.
Something is not right with our ways of living.
Let's recall the pleasure we felt when we moved -- ran, jumped, climbed and...

Our bodies are smart enough to remind us -- through a feeling of tiredness -- when it's time to slow down or stop. We don't need SOMEONE (or someTHING) telling US as WE know best when to continue on or stop.

As I came back from subway to bus carrying 15 lbs of cat litter and 6 lbs of grocery up and down many steps, walking another ten minutes to my suite on 2nd floor (yes there is elevator) I teased myself, 'How about walking up some more? Two more floors I was breathing heavy with mouthfuls of air; two more floors my Excitement was wearing out. Walking down used different muscles. Unloading to my apt I felt good and tired. Oh, I never looked what floor on way up. Staying in tune with body is wiser.