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Maybe not quite the same thing - but I do something similar. When I'm trying a new thing that requires physical endurance I set a pace in which I could "do the

Maybe not quite the same thing - but I do something similar. When I'm trying a new thing that requires physical endurance I set a pace in which I could "do the thing for many many hours" even though I know it's probably going to be much less than that. For example - I recently went on a bike ride with friends where we climbed an unknown (to me) hill. I slowed down a bit to a pace I could maintain long term. I was one of the first to the top. :-)

tonyarkles 11y ago
When I have the heart-rate monitor with me, it's really easy to stick to that zone. I shoot for a target heart rate of about 150, and I can go a long time. Last time I tried it was 7 miles, and I stopped because I'd looped around and was close to home. I set it up with RunKeeper so that it gives me a heart-rate report every minute, and I just tweak my effort a little bit to keep in right around the target.