This is an Kyudo practice method that can be done without a Yumi.
What to prepare.
Rubber tubing and comfortable clothing.
Be careful not to make it too strong or you will lose the shape of the Sya.
The rubber tube is about this long.
You can choose the strength according to your muscle strength.
How to do it with a rubber tube.
We are now ready to go.
Now let's practice drawing the Yumi with it.
Keep your thumb and pinky finger extended and close together.
Then, pull the rubber tube over your thumb and pinky finger.
At that time, be aware of the arrow.
The top part of the rubber is straight.
And your hands are open.
Do this as hard as you can so that your right arm is straight.
Practice in this way.
Here is an example of a common mistake.
My shoulders go up when I do Kai.
This is not good.
If you have a mirror, check your work in the mirror as you go.
You can do this practice at home, so try it.