Have you ever worked a manual labor type job?

There’s roofers working on my apartment. Which got me wondering about what it’s like to work any type of hard labor job.

How do you deal with heat and/or cold if it’s an outside job? (it’s only about 45 degrees, and there is a bit of wind). Is there a lot of pressure to keep going at a steady pace? How did you learn the skills needed? Do you just get used to that level of physical exertion? What do/did you like about this type of work? What didn’t you like? Were injuries common? Etc. I’d just like to know what it’s like.