Alan Bennet wrote:
Interesting article. Many questions, here are two: (1) How does 2.2 hops/second at 107% of body height translate to running cadence? Would the 12% mean change in frequency after eccentric training be good or bad for running? (2) How much of ordinary running is SSC and how does that vary with pace? (e.g. sprinting has high elastic return and jogging has almost none?) Something to think about for slower runners out there.
Charlie wrote:WALKING downhlll safely buildups your eccentric strength.
Okay, but in which muscles? Never noticed any DOMS in my calves after untrained downhill hiking, it was always in my quads. I would think it is on the uphill section that the calves get more eccentric work, during the stance phase, since the heel has to drop further to touch down.
Don't get me wrong, I love hills, they are the closest thing to a magic bullet there is in running. I just want to understand the downhill part before I change what I have been doing, which is to jog at a pace that allows my HR to recover.
Hi Alan
The article gave me another piece of the injury puzzle:
Fast running has a greater training effect on concentric contraction than eccentric contraction.
A muscle imbalance between eccentric and concentric contractions in the muscle can be the basic or root cause of injury. Hamstring pulls,Achilles tendon issues, Calf muscle pulls and Plantar Fasciitis. The good results using eccentric exercises for the achilles and calf issues are indicative.
Does downhill hiking have a greater eccentric training effect on the quads
and less so on the calfs?
Not in my case. The first time I came down Larch Mtn(4000 feet over 7.5 miles) my quads and to a lesser amount my knees hurt. However my calfs felt GREAT! They felt like I had just had a really good massage. Over time my quads and knees also felt GREAT. Then I noticed how much more range of motion I had when going down the steep parts. Then I started running down the steep parts with at time reckless abandon. Now I have never been able to run down hills well but now I can. So maybe the eccentric work on the lower legs while not painful is working....stronger with more range of motion less stress on the achilles and plantars.
Thanks for your reply.