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I'm by no means an expert but 3 miles in 20 minutes sounds pretty ambitious- if I were you I'd talk to a trainer. Thinking back, though I didn't try particularly hard in the sense that I didn't run outside of practices, I had to push myself to the absolute limit during races, and at the time I was 6'4 and about 165 pounds- in other words a skinny motherfucker. I did have mild asthma but it never affected anything that I could tell. On the other hand, XC races also involved other people snapping branches in your face, getting boxed into groups of runners, uneven terrain, and hills, so where you actually plan to run would make a difference. In general I think it's much easier to run on a treadmill compared to outside but that might just be the fact that it's completely level; I also find myself pushed a little harder than I might be when trail running because if I go too slowly I'll fall off the back, so it's much easier to set yourself a pace and stick to it. Again, though, I'm not an expert so I'd see a trainer to help you plan your workouts. |
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