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Showing posts with label efficiency. Show all posts
Showing posts with label efficiency. Show all posts

Friday, September 3, 2010

6. Are you a lifter or a pusher?


The answer could be the silver bullet your running needs

Last time we spoke about the forward lean & its contribution to an increased stride rate – a highly desirable component required to being an efficient runner. That forward lean is one component that increases stride rate; power application is the other. However an increased angle of attack does not guarantee increased stride rate in some cases, as habituated lifting of the knee, in an effort to increase/maintain stride length continues to access majority concentric muscle contraction of the hip flexors. This not only slows stride rate, but greatly increases the strength requirement & therefore an accelerated accumulation of fatigue from dealing with eccentric jarring from increased support phase weight bearing time. It also creates more fatigue because the stride falls more towards the forward sector relative to the center of mass, & thus increasing work to regain this lost inertia with each step. It is a common myth that in order to have that nice high knee lift when you run you have to fire your hip flexors – nothing could be further from the truth. By powerfully extending your leg downwards it subsequently is dragged rearward (because of forward momentum & the foot striking a stationary surface). The leg is not driven in an effort to push the body while it is on the surface – this would be counterproductive as tissue is supposed to be held semi rigid as connective tissue stretches/loads in anticipation for elastic release upon toe off. It is essential that the driving phase is seen as unloaded & with gravity. In this way the hip flexors are extended/loaded & pop back powerfully because of this, leading to that light, springy high knee lift so characteristic of great runners. Again, please make sure that you do not push while the foot is on the ground, but before this; it’s like throwing a pogo stick at the ground. If you push while the foot is on the surface you stop it from unloading elastically. Good running is 5 parts elastic return & only one part strength application – the more you lift your knees & try to power your body by driving the foot while it is on the ground, the greater the strength component, the slower the stride rate, the longer the stance time, the greater the rate of fatigue accumulation. Nuf said!
©Bobby McGee – Bobby McGee Endurance Sports
www.BobbyMcGee.com

Sunday, July 25, 2010

3. Fatigued Focus on the Run


New research shows lowest O2 usage (highest efficiency) when focusing on the running experience or sensation itself; simply competing or running. Staying in this less than fully conscious flow state can easily be interrupted by fatigue or any other loss of focus. When teaching runners to stay most efficient I have always advised them to focus on mood words in the beginning – words like strong, relaxed, fit, capable, ready, racer, smooth, relaxed, fun, racing, etc. Once fatigue sets in & they start to lose rhythm & their mechanics become disrupted & uncoordinated, (as they most often are right off the bike in triathlon), then flow & that type of ideal focus is lost & the runner must resort to a new tactic. That tactic is focusing on process. Focusing on fatigue or performance, especially outcome, is dissociative & has been shown to be the least efficient. Focusing on process can often return rhythm & flow. The skilled look for that beat of foot strike. A set of skills, like shortening the stride to return or maintain rhythm, can be taught/learned & can be ways back into the run.
So in summary: Focusing on anything other than that which can propel you forward faster during fatigued running can be called lost focus. Focusing on fatigue, or trying to think dissociatively, i.e. of something else to get your mind off the task at hand, when racing or running hard, leads to reduced access to fitness & ability. Focusing on how you are running (the mechanical movements) is also ineffectual, as this is a cognitive process that occurs so much slower (it is chemical), than the natural (electrical) flow of a reflex (unconscious) action. Thoughts on getting limbs & body into optimal position to gain maximum benefit from power application & elastic return are excellent ways to focus. Focusing on a feeling or image is also very powerful, especially when fresh. At the start of an endurance race, focus on mood words like, easy, smooth, powerful, relaxed, will help you to not interfere cognitively with your body’s natural ability to perform. In triathlon this would be relevant mostly in the swim & on the bike if a draft legal event. However, when fatigue sets in, it becomes useful to think objectively about what to do, especially if your form has deteriorated.

Bobby McGee – Bobby McGee Endurance Sports
http://www.bobbymcgee.com/