graham wrote:Interesting symmetry to the Iron Mtn graph.
The right side (uphill) of the graph make perfect sense to me (steeper = slower), but I’m surprised that you don’t have more scatter on the left side (downhill).
I know Iron Mtn has some steep and rugged downhill sections (maybe class 2) that require some slow and careful foot work. But there are also clean downhill sections that you can really motor down and would expect to be at least as fast as on level terrain; hence a lot more variability to the left side of the graph (downhill). Am I missing something?
Do you have a sore knee, ankle, etc. that slows you down on the descents?
Yeah I would think there would be more variance...however I don't think I would be going as fast as on level terrain (unless it was a race). I think there is a comfort level (again related to impact or eccentric contractions). When you move fast on a steep downhill, you will have large impact forces and also large joint excursions in the opposite direction of the muscles contraction, and this creates lots of muscle damage (in a good way) = soreness. Perhaps only a certain threshold of this is allowed unless I "overrode" my subconscious.
I don't think it had much to do with the looseness of the terrain, as you'll notice even in the trail run the same trend is there (Although it seems slightly faster downhill than up).
The downhill wasn't controlled in these examples, but sure is interesting...