Thursday, 14 December 2017

What is an Intermediate Skier?

One of the problems in skiing is there is no standard that defines an intermediate skier.  You know that you are not an expert as you will often hesitate to go down a Double Black diamond run.  You may struggle down a Black diamond and feel comfortable on Blue runs. Some kids don't seem to have a problem as you see them snowplowing down the steepest of hills.  
I had the opportunity of taking a course with one of the CSIA masters Don Korjevan who challenged us to examine our own skiing and to critique it.  I tried but found I was stuck.  It is difficult to bootstrap yourself to another level if you don't have a path to follow.  I once watched some CSIA and racers skiers training on a race course together. There was a major difference between the stiles of skiing.  The racers seem to sparkle on the course but I still couldn't see how it was done.  
Eventually, Jen and Ryan (Now Director and Deputy Director Mt. Washington Snow School, BC, Can) gave me the clues and opened a new dimension in skiing for me. My main question was why did it take so long for this to happen?  Why keep this a secret?  How did I get to this new level of having fun on skis again? At last, I was able to critique my own skiing and determine what was needed. In a nutshell, it was my skills needed quite a bit of work. So I developed my own definitions of some of the skiing terms and tried to get rid a lot of baggage. I also wanted to develop a progression that encouraged good skiing right from the start.  So my method is the result of my studies.  It is based on the basic skills that we use to talk about but never seemed to practice.  
The two skills that I was lacking were pivoting/counter rotation and what I call dynamic balance. 
So if you are an intermediate skier and want to move ahead you can test yourself on how well you can do the lessons in my manual and video. What is missing from your skiing?  Do you monitor the pressure on your feet when you shift your balance ( lesson 1)?  How slow can you perform (lesson 2 edge control)?  How are your pivoting skills, can you perform lesson 3 going in a straight line down a hill?  Do you start your turns with pressure on your big toe pad (lesson 4).  These are gauges that you can use to test your skiing. And finally, how well do you blend these skills (lesson 5)?
View my next post on the transition from beginner to intermediate turn.



Monday, 2 October 2017

Alan’s PRSF Ski Knee Witch Craft

 Alan’s PRSF for damaged knee cartilage: A possible alternative for the PRP procedure 

Below is my knee history and attempt at knee restoration. It is a slow fix in terms of many months but only takes a few easy minutes a day.  
I’m presenting this information now because it may help someone who has a similar experience to mine, to get ready for the next ski season.  Some people have tried the procedure that I follow and found an instant feeling of relief.  I have found a way to greatly increase the flow of nutrients to the knee using the knee’s natural structure and components. Minimally it improves the lubrication of the knee and ultimately, if lucky will repair the cartilage.  I have practice this for 7 months as a replacement for the PRP which failed me. For me the results are much better than the PRP and I name it PRSF (Plasma Rich Synovial Fluid).  All you need is to be able to count to 5 slowly, a few minutes time every day, and a compression band or 3 or 4. You can skip to the bottom for a description of the procedure if you’re not interested in how this came about.

About five years ago my right knee joint started to fail. Three years ago I mentioned this to my doctor and he recommended a joint replacement and set up a meeting with a local surgeon.
The surgeon told me that the replacement knee joint wasn’t as good as good as mine.  He gave me several alternatives. Three were knee injections and one was a brace.  The three injections were $200, $300 and $500.  I asked which injection was the best and he said the $500, which was the PRP (Platelet Rich Plasma). I opted for the latter and the brace.

I tried the brace route and found it the most painful experience. The hinges on the brace did not align with my knee centre of rotation. This caused great misalignment of all parts of the knee joint.  I gave the company a long detail note on what was wrong and eventually got a refund. That is another story.
Then, I also tried the PRP injection. After a year of 3 PRP injections the last one failed. A week after the last injection I woke up and found I couldn’t bend my knee. Very slowly I was able to bend it. The range of bending was sufficient for skiing. What to do about my knees?

I opted for a replacement and found the lineup waiting time was a year.  Then, I looked at the mechanical contraption that I signed up for and was not impressed.  So I started my research in earnest with the goal of determining what happened to cause the failure, what the PRP is supposed to do and what is the best alternative.  I’m a mechanical engineer not a medical doctor, so some of the reading was hard going. Some of the descriptions of some of the processes were not clear to me.
Platelets for instance are generated in copious amounts every day and their primary purpose is to cause blood clotting in wounds. Their secondary function is to help start healing. If not used, their life expectancy is about 8 days at which time they are processed out of the system. Doing the simple math there is always 8 days of supply in your body for damage control. I could not find a definitive answer for their use in the PRP application. Maybe bone surface coating.
I found some contradictory information. For example the general consensus is that there are no blood cells in normal synovial fluid and yet there are test to determine the white blood cell count in rheumatoid joints.  
I also found that the synovial fluid in the knee has some repair components that fix the normal wear and tear.  Failure of the knee joint is usually cause by excessive overload, infection and rheumatoid arthritis.  When the built in repair system is too slow and can’t keep up with these traumas, the knee joint fails. There is some stem cell work being explored and replacement cartilage is being grown and inplanted. This work is only in the experimental stage and not of much value to me.

In February I met a chiropractor, Jerome Fryer, who asked me to redesign a prototype chair of his for production. During our negotiations he told me about some of his work. One item he mentioned was that you can pump plasma into the lower back joints by bending over and then press on your upper thighs. This process stretches the joints in the back. It should be noted that joints are enclosed by a membrane that keeps the lubricating synovial fluid in the joint. When you stretch a joint, plasma (filtered blood) flows into the joint and fills the space created.  The time frame is in 3-5 seconds. The effect is to make you slightly taller for a while.  For several reasons I declined the project but this last thought intrigued me.

During my knee brace experience I learned about the knee construction and how it worked mechanically. I also learned a bit about all the components and how they function.  Articular cartilage, the amazing bone surface material and its lubricating liquid, synovial fluid, are the basic components that make all joints work.  There is also the membrane surrounding the joint that contains the synovial fluid and filters blood creating plasma. When in operation there is a continuous minuscule flow of fluids in and out of the joint.
The red and white blood cells are filtered out by the membrane leaving nutrient rich plasma to enter the joint.  The bone also supplies materials necessary to rebuild damaged parts.  The plasma and synovial fluid mix acts as both a lubricant and the medium for distributing these nutrients to the damaged area. When the plasma mixes with synovial fluid the viscosity of the mix is high enough to not leak back out through the membrane. (My guess, but some leaking must occurs in order to remove waste.)
The process during loading (walking, riding, etc.) the normal joint discharges a very small amount of the synovial fluid from the loaded surface and when unloaded the same amount is replaced. The displacement, of how much the cartilage is compressed is very small, about the thickness of a sheet of paper. The flow of liquid into the joint is similarly very small when the load is released and this is most likely the reason that the repair process takes so long.
When the knee cartilage is failing or failed, a relatively large space is created. The leg can now be bent both in the normal front to back motion but also very slightly from side to side. The surgeon checked the degree of damage this way. Bending the damaged knee sideways opens a gap about 100 times larger than in normal use.
The knee has two pressure contact points, one on the inner side (medial) and one on the outside side (lateral) of the joint. Either one or both of these surfaces can be damaged. One is a fulcrum in the below process for bending the knee sideways.
Muscles  Pushing Knees Together


So here is my solution for my right knee analogous to the back extension above:
  •   I press with very low force, my right foot ankle against my left foot instep. This bends my right leg sideways, using the muscles for pressing my knees together. My right leg knee is slightly bent.  The gap between the upper and lower bones open about 2 to 3 millimetres( on the medial side).  (I can feel the top of the tibia and the space that opens.) (After 7 months the opening is much less.
  •  I hold pressure 5 seconds then release it. (The plasma fluid in-flow time. 
  • Then I quickly flex and straighten my right leg 5-10 times in the normal direction to mix the plasma and synovial fluid. It helps if the limits in both directions are reached. 
  •  I repeat this process 4-6 times until I feel the fluid fill the space.  It feels cool (in the temperature sense of the word) as I feel the fluid spread across the joint space. No more is necessary.

·         I do this 2 times a day on my bed or sofa, once I get up in the morning and once when I go to bed.

When I stop with my knee bent 90ยบ I can feel the added fluid around the base of the patella (water on the knee). The knee joint is now slightly over filled with a Plasma Rich Synovial Fluid, hence PRSF.

One caveat is that I use a compression bandage biking and walking for exercise but not usually around the house.  I believe a compression band helps to increases the fluid flow between the front and back of the knee engineering wise.  For Skiing I use a compression band with side braces built in for some torsion (twisting) stiffness. At night I use a very light pressure band to keep the fluid in working space of the joint.

Some stress is necessary to ensure appropriate repair. Biking and walking are normal now. I’m holding off on running.  Something is happening and I know it is better. Unfortunately, I don’t have the equipment to determine what it is.  It took me a long time to cause the problem so I figure that it will take a long time to repair. I will know when and if this process stops working, the joint space will be filled and that my cartilage is repaired. The procedure has no effect on my good left knee.

Dare I say that some cartilage is being replaced?  Witch craft!

Next, my rheumatoid arthritis fix for skiers of course. AR

Sunday, 12 February 2017

Where to Start: Flat Land Training

    Before you start down a hill with your skis on it is best to learn a few simple skills. This will prevent you from being permanently damaged or maybe permanently turned off the sport. 
The whole process can proceed quickly if you do the flat land exercises first.  Then proceed slowly on a gentle hill first learning how to stop and then learning how to change your speed from slow to faster and back to slow.
The flat land training teaches how to use feet and legs in order to accomplish a certain feeling or action. It also introduces you to the rudiments of how skis are made to turn at your command.  Spreading your feet wide  wearing your boot without  skis attached you can simulate the same feeling you will encounter when making a ski turn.  
For instance when you lean forward you will feel both pressure on the ball of your foot behind your big toe and on your lower shins. By shifting your upper body from side to side you will feel the pressure needed to make your skis turn. 
If you repeat this motion without pressing on the front of your boot you will be in the perfect stance for you when skiing down hill.  
(When you become an intermediate skier the only difference is that both your feet will be side by side. You will also be facing down the hill with your skis on and starting a turn.)
     Next when gliding on one ski by pushing forward with the other starts your training for sliding and gliding on skis.  You can either make a square or go back and forth in a straight line.  At the corners or the end of a short glide line you make a turn by scraping the snow with your ski. By pressing out with your heel you can make you ski fan out in a wedge shape. If you use your right foot you will make a left turn. The process is similar to spreading peanut butter or mayonnaise on bread.  Give both feet a chance to go around several squares or lines. This motion simulates slowing down or finishing a turn. 
By completing these moves and exercises you have practiced all the rudimentary skills necessary to ski.
All the above is included in my free Manual noted at the top right corner of this blog.

Wednesday, 7 December 2016

Beginner Skiers Second Lesson Notes and Tips


SFS    FAST Slow Slow to Stop
Beginner skiers must learn to control speed, to stop and to turn.  This requires you to make your skis slide sideways to the direction that you are going.  You sort of scrape the snow with the edges of your skis. The harder you scrape by increasing the angle the slower you go.  If you scrape hard enough, you will stop. This is shown in the sketch to the left, Fast Slow and Slow to Stop.  Your first 2 lessons using my method are all about this scraping process.
  
The next picture shows me in the stop position.  Legs apart and almost straight, tip of skis close but not touching. Ski back ends spread wide. Me bent forward at the waist and arms wide.  Poles dragging.  A beginners stance for maximum scraping effect.


Beginners Stance

The last pictures show the effect or pattern in fresh snow of going fast and slow.  Where the pattern is narrow I was picking up speed, less scraping effect; and slowing down where the pattern is wide, more scraping effect.  You can see this in motion by clicking on the Free ski lessons video 

Slow Fast Slow 
Tip:  The first few lessons are performed in slower motion, about walking speed.  The closer you can come to a stop without stopping will give you a measure of your skill development. The theory is that it is best  to learn first how to do a particular move and the necessary skills slowly and well, before you apply any speed.

Notes:  For a beginner to stop on a beginner hill the legs must be pushed as far apart as possible.  If you can't stop then using this method, then the hill is too steep for a beginner or you may be bowlegged like me. In order to get the maximum ability to stop it is necessary to have at least one ski at 90 degrees to the direction you are travelling, lesson 3. 

Eventually when you have finished the six lessons and can ski parallel with some confidence then try stopping with both feet side by side, a so called hockey stop. Stopping with two feet is by far the best way to stop and takes the least amount of effort and energy



Saturday, 5 November 2016

Good News, Video and Trip

East Glacier Park, Montana, 2 days from home.
      In my last post in the spring, I promised a video of my lessons.  Andreas Ruttkiewicz, my collaborator in this venture, finished tuning the final cut and so it is now Public on YouTube.  I am really pleased with his work. For fun, he added my bloopers.  Here is the link Video: Learn to Ski, AlanR Method . The site is a work-in-progress and fine tuning will continue.  
My process for learning how to  ski is now complete. You can see and try each lesson.  You can reinforce each lesson by reading the manual for details. You can reinforce what you learn in the lessons by reading and understanding the third section of the manual. In this last section, you can find the answers to many of the Why questions.
There are some differences between the manual and the video which I will edit over the next year.  I like the part in the first lesson on mobility.  For going around in a circle, I show how to push out with your heel in order to turn your skis.  This is a fundamental move which includes 4 of the basic skills and is repeated often in different forms in the following lessons.  In lesson 3, you continue the first portion of alternate stopping but instead of stopping you just slow down to almost a stop and then continue with the next partial stop. I forgot to video this last portion of lesson 3. We will work on it.  
I know the current trend is to let the student try and explore and to learn by experience.  But I am old school in that I believe that skiing is potentially a dangerous sport and some basics should be learned before any attempt at open-field skiing.  I also believe in introducing the 5 most important skills in the very first session.  People stall out at the intermediate stage because some of the skills were not emphasized.  Pivoting is a good example.  
My trip home was wet for a couple of days. But Ontario to BC in 8 days, on a large scooter and camping along the way, is not bad ( 4400 km). The next day after the above picture was taken, it rained for 2 hours in the morning, going from Troy, Montana to Osoyoos, BC. The last day through the mountains of southern BC was spectacular. 

Sunday, 24 April 2016

Taking a Break

Late Spring Morning in the Mountains
The season has ended and time to give skiing a break.  
The season ended well for me with two highlights.
One, Andreas Ruttkiewicz, a cohort in VISAS, offered to video my lessons.  It turned out that he became my mentor, director, story board creator, camera man, and editor.  We did some preliminary takes one afternoon to find out what we needed to make it work.  Then we spent a day doing the video.  Andreas, who has an Ultralight Flight School, is putting together the final video in his  precious spare time. I am waiting on pins and needles for the result.  If all goes well we should publish in plenty of time for the new season. Who knows? It may be on YouTube for those down under this winter season, July?
And the other highlight involved a mother and her  two kids, boy about 8, and girl 10.  The mom I found, just starting down the beginner hill, fallen on the snow and two snowboarders trying to help her up. It was a cluster problem, so I swooped down and offered to help.  The two kids were in a similar situation just further down the hill.  
Because I love the opportunity to teach, I offered them a lesson and was accepted.  They had arrived too late for Snow School lessons and thought that they could muddle through on their own, being good hockey players. My progression took 2 hours and by the end, they were racing down the cat track at full speed under complete control.  The girl is a natural athlete who did everything I showed her perfectly first time. The boy was a little awkward, trying to make the skis act like his hockey skates.  He fell a few times but once he learned how to get up he just popped up.  The mom was happy because this saved their Spring break holiday.  As I have mentioned before, hockey  players are the easiest to teach and it is still true.
For me it was another great, enjoyable, feel-good situation.
My skiing related goals for the summer are to publish the video and make some minor manual revisions. Like in the manual, re-arranging lesson one and putting the alpine instead of the cross country skiing code, etc.
Anyway, have a good summer, keep in shape. I'll contact again in the fall. 
AlanR.

Monday, 29 February 2016

One Thought At a Time

It can be lonely on a foggy day.
I was reminded by Andreas, a fellow skier, that, as a ski instructor, one should give the student just one thought at a time.  So in my manual lessons, you could filter out the details and background information (often the whys of doing) to concentrate on the primary thought.  For example, in the first lesson, the primary thought is feeling your feet. This should be top of mind in the rest of the lesson, making a wedge, getting mobile on the flats, learning how to snowplow-stop and slow fast slow. 
Making a wedge requires more pressure on the heel in order to make the back of the ski spread the snow like a fan shape.  Similarly when turning during the mobility exercise you push with your heel to turn.  During the snowplow, to stop, you must press on your heel in order to push your heel wide enough to stop.  To go fast and slow and fast, you must modulate from low pressure to higher pressure and then low pressure repeatedly. This control of extra pressure on the heel is how you control your speed, the amount you turn and how you stop. All of this requires awareness of your feet. 
The third lesson is about the start of the turn, where pressure is concentrated on the toe pad. While skiing, your pressure is constantly changing from toe to heel. 

Sunday, 31 January 2016

Leaning to Ski is not Rocket Science




 Basically, skiing is about turning and stopping.  When I learned to ski the first time, there were only wooden skis and the way you turned was either a semi snowplow or a telemark turn. No such thing as steel edges or parabolic shapes. The first big improvement was the addition of steel edges which greatly increased the number of days you could ski. The skill of edging became important and skiing became easier. Over the years our skiing techniques changed mostly as a result of ski equipment improvement. It has always been a challenge to explore and adapt to these changes.  The most significant change recently for recreational skiing has been the parabolic shaped ski. All of a sudden this invention changed the time it takes to learning how to ski from weeks and year to a few hour and days.  Unfortunately, some of the teaching methods are still catching up.

My frustration as a ski instructor was that we are still teaching skiing the way we did 30 years ago. But I couldn't find a better way out until I finally discovered, that the transition from one turn to the next is the most important part of skiing.  It is the end of one turn and the start of the next, and this is where I started.  
My first attempt at a manual was really a collection of notes, about 150 pages. Much too long and disjointed.  I knew that I had all the information and parts but I needed to find the basics of moves and skills.  Mike McPeek  first showed me a rough sketch of the diagram above which I believe is a snapshot of the important first skills to learn and their relationship. If you examine my lessons closely you will see a trend. If you examine even further the lessons mirror the transition between turns. 
There is a progression. The first lesson starts from the outside ring and move directly into very rudimentary core of control skills and blending.   The subsequent lessons then concentrate on embellishing and finessing these skill and are arranged in a sequence of increasing difficulty.  
I'm continuously testing my method to find ways of improving or vindicating that my process is valid.
 Last week I saw a beginner give a most spectacular display of athletics, arms and legs all moving in different directions. What I  really saw was great balance and determination.  I couldn't resist and offered my services. Within 2 hours he was parallel skiing.  When that happens I think I am the most spectacular instructor but in reality it is the student that makes the difference.  In this case the student was a boarder, an quick learner and as I said has great balance and determination.   It is not rocket science.

Sunday, 10 January 2016

Balance is the primary skill in skiing.

Pressure scale
Balancing on your toes and heels
Balance is the primary skill in skiing.

I took these sketches from my manual , as this is a good place to start the season. 
When on the hill, an instructor will tell you to have a good centered stance. Translated, this is shown as Neutral in the above left diagram with your weight spread equally on all 4 pressure points on your feet.
The purpose of the exercise here is to feel your weight change concentrated on these pressure points. 
You can practice the following on a hard surface in your bare feet or anywhere else with your shoes on. 
  • It is best to first spread your feet apart until you feel pressure only on the pressure points of both feet shown in the diagram. 
  • Then move your weight front to back, left to right on both feet, balancing on your toe and heels to feel the pressure change on 2 pressure points at a time.  
  • Finally, apply full weight on each of the 4 pressure points. Note how you have to shape your body to make this happen.
  • Experiment a bit with your arms out, at your sides and forward; they make a big difference.
You will only be applying pressure one foot at a time; the other foot is used for balance. Balancing is finessing where you shift your body, arms and legs, to apply pressure to your feet.  

Later, when on the snow in your skis and boots, repeat the above with the tops of your boots loose, both standing still and moving.  Boots are different from bare feet and shoes because it is possible to push on the tongue when putting pressure on the toe and on the boot back when applying pressure on the heel.  For a centered stance there should be almost  no pressing on the tongue or boot back. Your body position should be bent at the waist, both forward and to the sides.

When skiing, this exercise is equivalent to what you  feel when tilting your knees in the direction you wish to go. In order to turn quickly and efficiently, you start the turn on your toe pad and finish the turn on your heel. This is a much better method than trying to rotate your skis with your leg. It is called steering and takes a little practice. Maybe a season?  
Balance is the primary skill in skiing. This is just the start.

AlanR.