I cut grass in my yard and two commercial locations yesterday. I towed my riding mower and push mower around on a trailer.
The temp was upwards of 91 F. I did drink a lot of water and I got through pretty well for a 62 yo geezer. I find my head starts pounding when I reach my limit of endurance.
Also last week I poured some steps that took 52 60# bags of Sakrete. I had to move them by hand 4 times. Onto the cart at the store, into the truck, into the garage and into the mixer. I lifted and carried 12480 lbs of Sakrete.