Worked for a res. Electrician for 6 years. It is often a pretty decent physical gig: drilling holes, pulling wire for days, climbing up under over every book you can think of. Someone else mentioned ground rods (relatively infrequent but), digging trenches for conduit, pulling the wire into the conduit, making up thousands of wires in boxes again and again.

Bending a 200 amp service wire around in a panel is no light task.

As someone who has never been to a gym, but has grown up on a farm and lived a life of mostly trades, it reminds me of all I see written about the different types of working out and how gym can be so different from physical labors conditions where what you are doing may not be a giant lift, or a giant use of force, but you've got to be able to do it for hours a day, back to back to back, day after day.

Our perspectives delude us.