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Open Canoe
Welcome PDF Print E-mail
Written by Jan Van Hees   
Sunday, 03 May 2009 12:54

Welcome on Open-Canoe.

On this website you can find information about open-canoeing. 

 The goal of this website is to provide some info about canoeing, the way I interpreted this over the years. There is a lot of good information around, I try to gather the parts that I consider important.

Therefore I mention in the library section the reference books/dvd's, so you can go and have a look yourself. This website is only an attempt to take out the best parts of the reference works.

Also you can find some subjective reviews of gear, boats and so on. Of course I cannot review everything that's around, but at least you can get an impression of what's around.

 Last but not least I'm inviting you to join this website and add your own articles, activities, ... . I think that C-boating is already a small community, certainly in Europe. Therefore it would be nice to get in contact with other C-boaters all over Europe. This allows us to join, meet and have fun on the rivers.

 

Enjoy the website! 

 
Boat tilt a (new?) vision PDF Print E-mail
Theory - Strokes
Written by Jan Van Hees   
Friday, 02 July 2010 10:04

By getting into my Esquif Prelude recently, it was time to question boat tilt once more. Some way or another that boat managed to tip me over to the site I was tilting. So there must be something wrong... . I also knew that something was still wrong because I still didn't get a good grasp on my roll. Yes of course, I do roll my viper11, but fail it with the prelude.

You cannot lift the leg you're standing on

What's in the name, stand on one leg, and try to lift the knee of that leg. It simply won't work.  In a canoe you can suffer the same problem, you push down on one knee. If you're not careful, you start leaning on that knee, like standing on the one leg. And then you cannot lift that knee anymore to equalize the boat tilt. It's like getting in a very light bell-buoy lean, or pushing the gunwale.

Equal pressure on both legs

That's the clue of boat tilt, keep equal pressure on both knees, then you can lift or push if you need extreme compensation. Theory is easy, but how does one do it: you have to work your hips. Your body is an upright upper body, a loose axe in the lower back, and hips that can tilt from one side to the other. If you put an imaginary bar on you hip bones, that bar should always be parallel to the thwarts of your boat.  By working with your hips, you can maintain an equal pressure on both knees, you're balanced. If water pulls you out of balance, then you can counter that action by pushing and pulling to move your balance in the other direction. But only in very rare situations, if hip movement is not enough.

What about push one knee, pull the other?

I think the push one knee and pull the other knee might have to do with an incomplete understanding (not claiming I have a complete understanding!) of how body movement works.

First of all, you can pull up one knee and push down the other without too much hip movement. Have a look at the person riding a bike in front of you, they are actually doing that. No, you should not watch the pro-racers, you'll see they move their hips quite actively to add extra power to the movement, out of the hips!

Secondly pulling your leg over 90° with your upper body is a hard job to do. There is no direct muscle connection that can pull very strongly to pull that leg higher. It can be done, sure, plenty of people can do it, but very few can add power to it.

At last it has to do with how people move. For every move there are muscles that initiate the move and other that support or follow the move. The pushing and pulling might be right for many people to result in working with the hips, but it wasn't the case for me.
The movement one wants to reach is moving the hips as described above. How you reach that movement is another story: push-pull with the knees, hip-muscles, ventral-muscles, whatever muscle that initiates the movement. The others can be used to support that movement.

Compare boat tilt with torso rotation: you don't say bring forward one shoulder bring back the other, no mostly it's just explained with torso rotation and you can focus on improving that rotation by paying attention to what your shoulders do. But the main topic is: torso rotation.

But like I said, this is my interpretation. Most books and videos talk about tilt and knee-motion. If it doesn't work for you, think about tilt differently, think about what you really want to reach: move with the hips. Then  you can figure out what for you the best way is to initiate that move.

 
Stroke fundamentals PDF Print E-mail
Theory - Strokes
Written by Jan Van Hees   
Wednesday, 30 June 2010 09:44

When paddling efficiently, there are 5 fundamentals you should take in account, for about every stroke you make. There will be exceptions to these 5 cornerstones - as there is for everything - but most of the time you should incorporate them in your stroke:

  • torso rotation
  • vertical shaft
  • catch
  • impulse
  • paddlers box

 Torso rotation

 Torso rotation has an impact on which muscles you use for your strokes. Basically you can make every stroke with those tiny little arms. Rotating your torso - winding up a spring - and progress the motion from torso rotation puts a lot more power to the stroke. As an extra advantage it's much harder to get totally out of power from your back muscles then it is from you arm muscles.
Torso rotation is present in almost every stroke! Notice the rotated torso for the forward stroke in the following image.

torso rotation

Vertical shaft

Whatever move you want to make in your canoe, your paddle (shaft and blade) should always be at 90° of the direction in which you want to move. This way you use the full power of the blade to move you in that given direction.

Let's have a look at sculling. If the blade is planted vertically in the water, then all of the movement is carried through the blade onto the paddler and the boat, to move the boat sideways. If the shaft hand is wider out then the grip hand, there is a given part of the movement that is resulting in an upward power to the paddler and the boat. That portion of power is lost, since we cannot lift ourselves out of the water. 

So keep it in mind, always have your paddle as vertical as possible on the direction where you want to move to maximize the force in that direction.

catch

The catch is the so called planting of the blade in the water.  Imagine that your blade is a super-freezing device, and the water instant freezes from surface to the bottom of the river/lake. Once firmly planted, you can use the paddle shaft to pull you and your boat forward. You cannot freeze water in the air and let it hang there. So it makes no sense to splash. That's all lost energy.
With a good catch you can use 100% of your energy to move you and  your boat. A bad catch results in some movement of you and your boat, and some displacement of water with your paddle. How much boat movement and how much water displacement you get, is depending on how good your catch is.
The clue is in a good timing, you should give the blade the time to get fully submersed before you start pulling yourself forward. Pulling too soon results in a bad catch, just like pulling too hard will.

In the following image you can see a well planted blade with a good catch. The blade is fully submersed and can be completely moved for an impulse to turn the boat.

catch

Impulse

After you made a great torso rotation, planted a good catch, it's time to pull yourself  forward. The clue here is to do it in an impulsive way, like the martial-arts guys do their strokes. The advantage is that if you're pulling with an impulse, you have a firm grasp on the water, not allowing the water to flow around your blade. If you accelerate too slow, there is always a portion of water that will flow around the blade without having an impact on the forward movement. Then you're just displacing water. So with an impulsive stroke, you are maximizing the resistance of the water against the blade and thus maximizing the power on you and the boat.

Paddlers box

The paddlers box is a virtual box in which the paddle can move around. It is limited by a plane parallel with the shoulders, from the gunwales to the forehead. The width is a a bit wider then the shoulders and the depth is about an extended arm length.

paddlers box

 

 

 

 

 

 

 

 

 

Moving around with your hands and paddle in that box is relative safe for your body. Getting out of that box exposes your body to injuries. No, you won't get injured if you paddle outside the box, but the chances of getting injured in case of an unexpected action or movement are a lot bigger if you're paddling outside the box.

The following image shows a stern pry out of the box:

paddlers box This paddling position leaves the shaft-arm shoulder in a very vulnerable position. In case a stone, tree or any other object in the water is hit with the blade and the blade is forced upwards, the shoulder is being put under great stress, without possibility to get out of that position.

You should give the box a try, and you'll notice there are some very good reasons why you should stay in the box.