jaguar1 wrote:
My undergrad research looked at blood lactate profiles with different strength training regimens. The conclusion was when you include both concentric+eccentric loading (rather than concentric alone), you produce more blood lactate and consequently greater growth hormone release. Eccentric loading is muscle lengthening- resisting the movement back, or as applied to running ~hard downhill training.
My muscle phys professor in grad school studied eccentric loading- essentially running mice on a downhill treadmill and studying the muscle damage and protective effect. Won't forget his advice- all you need is one good, hard downhill session to protect the legs for an extended time and prevent cramping. Whether you get the "protective effect" from strength training, hard downhill training, and/or even from back-to-back marathons it should all help due to the benefits of eccentric loading.
Maybe I'm having a brain fart here, but what common strength training modalities don't include both concentric and eccentric loading? I don't think people are really looking to break out a elliptical machine or hand bike as strength training to improve their marathons.
The forces are greatest on a hard downhill run, but literally any running has a significant eccentric component.
Protect the legs in what way? 'Strength Training' has been shown to increase bone density, connective tissue strength, muscle tension (key to resisting eccentric motions in the muscles and shifting said eccentric action to the tendons, which is highly desirable),neuromuscular recruitment and firing patterns, and of course hormonal responses. I can semi-recall reading an article about the benefits of occasional (monthly?) hard downhill sprints, and definitely remember resistance to cramping being one of the benefits along with a couple other things I can't remember off-hand. What else am I forgetting, because the gist of the article I read in no way was suggesting a heavy overlap with strength training (or even more consistent multi-jump/bounding training).
*Not directed at jaguar1*
It blows my mind topics like this still come up all the time. Literally any legitimate coaching education program will teach you the benefits to strength training. If you just read up on running training, most of the best books on the subject have an entire chapter dedicated to the benefits of it. Anecdotally, a preponderance of the top level athletes across all Olympic distances do it. Yet here on the LRC half the posts about strength training are "run more miles", "run hills", or "lifting will make you bulky". Absolutely mind-bottling.