Tomorrow is the yearly November Black Belt tests at the Shudokan Black Belt Academy in Nottingham. I will be attending as partner to one of the testers and probably to help with some administrative tasks. I will also be teaching all morning at the Dojo. Here's some advice I thought I'd share, primarily for the people testing:
1. Your etiquette MUST be exemplary. Treat everyone in the Dojo with the deepest respect regardless of rank/training status. Make sure you show that same respect for the place, bowing properly and sitting in Seiza, with a straight back.
2. In Budo, confidence is very different to arrogance. The difference is one of motive, and will show on your face and in your body language. Be confident. You have trained for this day and are (should be) ready.
3. It'd be great to see you for training before the test, purely to warm up and keep your mind focussed. This should not be a cramming session. You should have been ready weeks ago.
4. If you make a mistake, make it properly. Bow to the examiner and correct your error.
Short and sweet.. I hope you find this helpful. Let me know if you want anything committed to video.
Showing posts with label grading. Show all posts
Showing posts with label grading. Show all posts
Friday, 28 November 2014
Tuesday, 20 May 2014
Tangential forces
Was just musing while I had a work out at the dojo.
If you try and use your arms (lets give them a value of a) then your Ft (Total Force) = a for all a. If you bend your knee, whilst making the near right angle triangle, you create 'free' power from gravity. Resolving horizontal and vertical;
[ignoring friction and considering the back leg a fixed point]
m(your mass[what you call your weight]) * G (gravity, giving your true weight in Newtons) * tan (the hypoteneuse of the triangle created from upright position, the floor and your throw angle) theta (the smallest angle of that triangle) + b (vector sum of the horizontal component given from back leg pushing, can't be bothered there's enough maths here already).
For those of you who understand all that you can see your arms need to meet your partner 45 degrees from the horizontal relative to the enclosed systems height. For everyone else hopefully you can see that this is clearly going to give you a far bigger number. And the best thing is when you get good enough you can add 'a' on the end of all that.
So lets assume that your weight is bigger than your arm strength. A maximum power Aikido/jujutsu throw that's not down, will give you many times the value of your strength, plus your strength added on the end.
I just thought that was awesome.
If you try and use your arms (lets give them a value of a) then your Ft (Total Force) = a for all a. If you bend your knee, whilst making the near right angle triangle, you create 'free' power from gravity. Resolving horizontal and vertical;
[ignoring friction and considering the back leg a fixed point]
m(your mass[what you call your weight]) * G (gravity, giving your true weight in Newtons) * tan (the hypoteneuse of the triangle created from upright position, the floor and your throw angle) theta (the smallest angle of that triangle) + b (vector sum of the horizontal component given from back leg pushing, can't be bothered there's enough maths here already).
For those of you who understand all that you can see your arms need to meet your partner 45 degrees from the horizontal relative to the enclosed systems height. For everyone else hopefully you can see that this is clearly going to give you a far bigger number. And the best thing is when you get good enough you can add 'a' on the end of all that.
So lets assume that your weight is bigger than your arm strength. A maximum power Aikido/jujutsu throw that's not down, will give you many times the value of your strength, plus your strength added on the end.
I just thought that was awesome.
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