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Archive for the 'Gravity' Category

The Physics of ChiRunning, Summary

Aug. 12th 2012

There are many that suggest “gravity is a vertical force”, which is true, and that “it only acts downward”, which is also true. But then they say “gravity can’t help you move forward”. This I contend is not true. Without a full physics analysis considering all the forces present it is not possible to determine the net force on the object or whether acceleration or deceleration will result. Plus you can feel this effect is about 30 seconds …

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The Physics of ChiRunning, Momentum

Jul. 30th 2012

A previous post (The Physics of ChiRunning, Lean … Analysis) with a physics analysis suggested you can use the external force of gravity to your advantage. Doing this adds the concept of a “controlled fall” to your running gait cycle. You can get the feeling for this concept in just a few moments as described in this post (The Physics of ChiRunning, Lean). But the key to this is allowing the fall to happen as described in this post (It’s Not (All) About the Lean).

“Allow is a huge study word.” – Danny Dreyer, ChiRunning/ChiWalking Author

You can think in terms of allowing yourself to fall subtly with each step, but you can also

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Posted by echifitness | in All, ChiRunning, Gravity | No Comments »

It’s Not (All) About the Lean

Jun. 11th 2012

The ChiRunning concept that seems to be most referenced is that of a subtle forward lean forward to aid in propulsion. There are challenges in the subtle forward lean position (Blog Post: ChiRunning Common Challenges, Lean) and there are challenges implementing other concepts to support overall balance. One very important supporting concept is relaxation; and specifically relaxation in the lower legs, ankles and feet. To “get” ChiRunning, it is not so much about leaning some amount as it is about relaxing in any angle of lean. Lean too much and you will likely tense up. Just tense in general and

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Posted by echifitness | in All, ChiRunning, Gravity | 2 Comments »

The Physics of ChiRunning, Lean … Analysis

May. 10th 2012

This is the first of a few posts on the subject of physics in the running gait cycle. This post is a little long with some more technical content but my intent was to keep a potentially complex subject simple. A previous post (The Physics of ChiRunning, Lean) provided a way to feel the pull of gravity on an aligned column. If you can feel this effect and it works for you, leave it at that and keep practicing. If you want to dig a little deeper to see what might be causing this effect, then this and other posts here may be helpful to you.

Recently a number of opinions have surfaced online that oppose this body sense of falling

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The Physics of ChiRunning, Lean

Jun. 22nd 2011

So the discussion is on. Question: Should I lean when I run? Here is my answer: If you don’t think leaning will help you, don’t. If you think leaning might help you, experience the effects first hand and draw your own conclusions.

Some “experts” suggest that it is not possible for gravity to propel you forward. This is very interesting since I have been using gravity in this way since I started ChiRunning® (“chee-running”, Chi Running) 5+ years ago. I don’t push, reach or pull – yet I move forward. How is it possible for the experts, draped in degrees from prestigious universities, to suggest that what I do is not

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Posted by echifitness | in All, ChiRunning, Gravity | 6 Comments »

ChiRunning Common Challenges, Lean

Mar. 17th 2011

One of the key ChiRunning® principles is to cooperate with external forces, using them to your advantage whenever possible. The external force of gravity can be used to your advantage for propulsion if you can get your center of mass (COM) out in front of your feet. How efficient you are in this lean while staying relaxed and balanced is one of the many concepts (See: Elements of Running Efficiency) that can determine how efficient you are in your ChiRunning.

Here is a summary diagram of the ChiRunning mid-stance (or loading) position which supports an efficient lean with

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