I work in a very hot machine shop, I wear shorts year round. In the summer it has been 120F inside. On my half-hour lunch I ride 7 miles if it is above 40F outside. I lift and flip steel plates all day, from 1 pound to 1 ton. Generaly working with 50-80 pound range. Very physical, sore back most of the time. Riding keeps me sane. I have worked 60+ days straight, at one time I worked 23 10 hour days in a row.