I am 6'2 tall and 16 and a half stone, largely due to the fact that I am a big build and like the weights area of my gym. I am fairly good at running and can go several miles at a reasonable speed before I start to feel tired. My main problem is the bleep test, simply put I start to 'feel it' at about level 8 after which I begin to struggle. I have hit 10.2 before but I am currently topping out in the early 9s. The problem seems to be the slowing down and turning - I am like a supertanker!!! Practicing the bleep test would be very difficult where I live. Is there any running machine or street running exercise that I could do which would broadly simulate the conditions of the bleep? Pressups and situps are not a problem, as I can exceed the joining requirements by quite some distance. Any advice would be much appreciated!