In my entire personal network, I think I know only 1 person who actually lifts weights. Why is this? I wonder (1) what percentage of my friends regularly work out and don't talk about it and (2) what percentage of these people lift weights versus doing other stuff. 

I imagine it's (1) 50% and (2) 5-10%.

Founder of venture DAO Chainforest (www.chainforest.xyz). Also treasury Co-Lead @ FWB. Liftcaster. Fashioncaster. Dadcaster. NYCaster. NBA Caster.

i too pick things up and put them back down

Seconded. I also sometimes move my feet in circles on a stationary bike.