WOW, I hadn't heard that term in years,.,.
When Belichick was our coach in the early 90s, he had a hill put on the side of the practice facility.. It was a grass hill with a fairly steep incline and would reportedly make guys run up and down that hill constantly.... Some players complained and some didn't. nothing new there.
As for Bodden and Unck, if memory serves me correctly, both are coming off injury so it's more than likely a way of getting or keeping them in shape untill they are able to get into the practice regime with the other guys.... Just a guess however!