Probably the guy on the sand vs the rocks....a lot of wear and tear on the knees hopping around rocks. and they hurt a hell of a lot more when you fall on them.
I would say White Collar because of a more flexible schedule to see medical professionals. makes it easier to take advantage of things like annual physicals and wellness visits. Since they are salary they have more flexibility to schedule around things.
A blue Collar guy has to be there a set time and is usually paid hourly....so a Doctors appointment usually translates into lost wages so they tend to blow it off until it becomes more serious.
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