I could see a possible connection due to the caffeine effects and muscle tension, especially if a static job or low activity level vs activities where you can burn off the caffeine/tension.

When I was working 10 hr days I was drinking 3 or more cups a day w/ cream & plenty of sugar... mostly those small cups from the coffee vending machine though..
My job was alternately sitting/standing but very active in upper body/arm/hand use so I think I burnt off the caffeine effects for the most part.

now, a cup in the morning and maybe 1 mid day if a chilly/wet winter day...but I'm sure I get more sleep now than I did back then, so I don't need it to stay awake- or for energy.