But when it comes to more precise work, like speed intervals or even a fast tempo run, I find it necessary to head inside to the gym to use the treadmill. The fast starts of the intervals and the quick pace and high turnover of the tempo just make it too hard to run outside. It's very difficult to get a good grip on the road, and it can get quite dangerous. Obviously I prefer it outside, but sometimes you have to throw the macho attitude aside and think of safety (especially when your wife worries about you running in the snow with cars, trucks, plows, and so on, chasing you around).
My problem is this: when I calculate out the treadmill speed required for an interval set or tempo run, it seems almost impossible to stick to it. For example, I can run a 5-mile tempo outside at 7:45-8:00/mile (my tempo pace for marathon training - yes, I know it's probably slower than yours). The equivalent on the treadmill is roughly 7.5 to 7.8mph -- and I find it VERY hard to keep that pace for the full five miles on the treadmill. It almost seems impossibly fast.
I know the math is right, but I don't know if 8-minute miles outside is really "equal" to 7.5mph on the treadmill. Maybe it's all in my head, and I just need to suck it up, I don't know.
The marathon is April 25th - and I'm very much looking forward to when I can do all my run sessions outside.
We're supposed to get a few days above freezing this week coming up... maybe the sidewalks will clear a little. As usual, time will tell.
