For other readers, the Garth that Gotz refers to is a former customer of mine who developed a power measuring system some years ago that was based on shoe insoles with hundreds of 0.5mm thick pressure sensors encapsulated in the insoles. The system pressure mapped the foot, and provided information on torque and power for each leg separately and had many features that nothing on the market has yet come close to. Why it isn’t available is a long and complex story that I don’t want to go into.

Wolfgang is Wolfgang Petzke, an engineer, inventor, rehab specialist and friend of Gotz’ who has devised two separate versions of a system; one pedal based, one crank based, that measures the forces applied to them in ALL planes. To explain this further; SRM’s, Quarqs, Powertaps and the like measure force applied to the system in a single plane. Wolfgang’s system measures forces applied in all planes and through brilliant software and electrotrickery allows the following:

Individual contribution to total force of the muscles of hip, knee and
ankle for each leg separately to be quantified.

Relative balance of non conservative forces (those that contribute to
propulsion) to conservative forces (those that detract from propulsion).
And real time training to improve this balance.

Ability to see in intimate detail what effect changes in rider positioning
have on the body’s global efficiency in performing on a bike.

Exciting times, stay tuned.
.

Wolfgang was introduced to me by Gotz via email, and apparently much of the
info on this site made sense to him and he is planning to visit in March
to see what his equipment and knowledge could do when paired with some of
the stuff I have come up with in regards to bike fitting.

I was planning to write a post once Wolfgang had been here and still will,
though Gotz comment has pre empted that. Doesn’t matter, I’m very
interested to see how Wolfgang’s equipment works and it seems like it has
Gotz excited and I’ve known him long enough to know that he is not an
excitable guy by nature.

Greetings, Florian

sorry for the late answer, I had a lot of business the last few days.
I will try to answer your questions. In the post I have written are a few minor mistakes. That happened, because I´m not used to write in english. Reading ist fine, but writing isn´t as easy as it was during school time. I switched a few words. The lymphatic nodes grow with hyperplasy not hypetrophy, but that are only minor errors. They have nothing to do with the content of my post.
Regarding your questions:
1. you can compare the lymphatic system with your cardiovascular circular flow. There is a major difference. The lymphatic systems starts in your tissue with a kind of pipes. These pipes collect the fluid in your tissue. Why it got there doesn´t matter, it is physiological. The pipes come together in the nodes (it´s only ashort explanation), where the fluid is collected. After a lot of stations the fluid ends in the cardiovascular circle.
Why the lymphatic nodes change their consistence and their connecting tissue is a long explanation, but it doesn´t matter. The tissue isn´t flexible anymore. Normally, they hurt when you stretch them. That happens during an extension of your hip. Because they aren´t flexible, they can´t expand or give way when they are compressed. Imagine a old piece of rubber. you can break it, when you stretch it and when you compress it. That´s a way you can imagine the pain in the nodes. BEWARE: the nodes don´t break like the piece of rubber

2. As I tried to explain, the lymphatic system transports fluid. The pipes i mentioned transport this liquid when they are compressed. This decreases the diameter of the pipes and the fluid moves. There are one-way-valves in the pipes, like in the veins, which ensure a movement of the liquid in one direction. One of the huge motors of this movement is contraction and relaxing of your muscles. This helps the fluid move.
when you stop your training, the nodes collect the fluid, metabolic substances and so on. You have a lot more metabolic substances. The contraction of your muscles helps to move the fluid faster through the pipes and nodes as normal. Without training, the fluid last longer in your nodes. metabolic substances aren´t very healthy for your connecting tissue. so the nodes compensate and chance their consistence.
Your system isn´t overused. That was one of the other mistakes I made. It still works perfect. If your lymphatic system doesn´t work properly, you will develop a lymphedema (try google for pictures. It´s horrible). But their is a change in the consistence. This gives pain.  — I did a lot of writing and forgot one point. When you have a tonsilitis, your lymphatic nodes below your mandibula are swelling and hurting, but they still work perfect –
Your right, the amount of the fluid is nearly the same (during training periods it is a bit more), but the huge difference is the time the fluid stays in the system. This gives the metabolic substances more time to do their “evil work”.
I hope, that helps. If you got further questions, just ask.

Your chiro must check the nodes in your hip. They are near your arteria femoralis (you can check the pulse in front of your hip). He or she must have a lock if the nodes are flexible. If they feel like a little nut or almond, they can give pain.

And yes, when you sit down, you will compress them.   

Your quotation from the forum below: something like this is in my mind. I will give an theoretical approach in the next days. When your interested.
but remember: these are theoretical thoughts. It is no diagnose.

Thank you for your patience and giving me something to think about.

greetings, Florian

I don’t know whether the warmer climate here is a factor or not but I have no meaningful advice I can offer.

I don’t know much about skiing at all and have ony fitted 3 pairs of ski boots at the request of fit client who is also a giant slalom racer. That is the sum total of my experience with skiing, so I can’t offer you much.

Before I had a look at her, she had been to her own doctor and an orthopedist None of them could find anything wrong with her knee, and both recommended insoles to relieve the pain.

I don’t think she has any major functional issues. We only had a few hours but I had her do some of the Gray Cook tests. We didn’t do the squat and the hip twist. But she had no problems doing the others in first try. I wasn’t assessing the test in great detail, but I thought that if she failed any of them badly, I would be able to see it right away.

We ended up with three heel wedges in the left foot and one in the right. This was fitted with orange arch support in both shoes. This seemed good when walking, but she could maybe have used a bit more for cycling.

I had a hard time determining any difference in her pelvis. It was quite hard for me to asses, so I thought I better not read too much into it.

She walked around for a while before we settled on the correct arch support. But after she had gotten used to them, I put her on a trainer with her bike.

First of all she was sitting way too high, so that was corrected first. Then she had a go pedaling away with no trouble and she looked pretty good with knees tracking fairly straight.

I then removed the left arch support and put her back on the bike. She had 3 or 4 pedal strokes before she lost her balance and nearly fell of the bike to the left. She said wooow, it feels like I’m tipping over to the left. The bike was dead even and completely locked into place on the trainer. We put the left arch support and heel wedges back, and she was back on balance.

Looking at her from the front and down on her knees, it was very clear that her left knee was all over the place without the arch support. And with the arch support, is was very easy to see the difference.

I also had her sit on a chair and get up and down while lying down behind her and watching her ankles. This also made it pretty clear, how much the wedges supported the movement. Basically it corrected the whole of her lower leg in the up and down movement.

Taking into account that her doctor or the orthopedist couldn’t find anything wrong with her knee, and both recommended insoles for correction, we are actually thinking if she could go skiing with the insoles in place, provided that she feels her knee pain diminish in the near future.

Of course I wouldn’t want you to make any recommendations for my sister. But, are there to you, any risk factors involved in skiing when you over pronate, but have proper foot correction and support fitted?

Thanks for the advice. I do have a pelvic tilt, right side is about 10mm lower than left.
I do have the right side bias as well, but lowering my saddle corrected a lot of that.
My left leg is never as fluent as the right, so the shim could be worth trying.

Thanks again

Andrew