tons of walking

i have a friend who is a cart pusher at wal mart. hes only allowed to push 10 carts at a time (he works 4 hours a day 5 days a week). he was wondering if anyone could ballpark about how many calories an hour he burns doing that
 
what speed does he move?
how heavy are the carts?
what is the resistance of each of the wheels?
what kind of surface is he on?
what kind of shoes does he wear?
is is level ground or uphill?
how many steps does he take?
whats his average heart rate during on trip?
how long does each trip take?



Sorry, yes we can work it out. But its very complicated and not at all usefull. Lets just say that it doesnt count as exercise. If your heart rate is not high, then your not doing anything.
 
haha its ok, just trying to help him out. either way though, i suppose as long as he isnt eating all the junk food in the back hes doing more than alot of people
 
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