It's about seated.

　Sitting up straight will make you numb! But it's quite different depending on how you sit. So-called grandma sitting is the easiest. It's like losing weight without stepping on the soles of both feet.
At first, my joints were stiff and it was impossible, but little by little I got used to it. It's pretty easy. However, there is a limit, so if you get numb, move your weight towards your knees for a while. I'm going to change the points I apply so as not to put too much strain on my knees.
Ultimately, I think it's about increasing the time little by little so that it's not unreasonable. People in the old days were commonplace to sit upright, so it might be okay to borrow wisdom from elderly people. That's how I learned how to sit like this grandma.

It seems that if you sit a lot, your blood vessels and nerves will thicken to some extent, making your legs less likely to get numb. But there is a limit to that, and it actually makes me numb.

But I get used to being numb. At first I was like, “Wow, that hurts! I don't like it anymore why do I have to be made to do this ahhhh!!!” What I think is, “Ahhh... it hurts. yeah, it hurts. Well, that's always the case.” It's like that.

Also, I get used to it and empirically know how numb I need to be to walk, and how long I can walk with a fine face even when I'm numb, so I adjust it. The monk knows how long it will take for the memorial service to finish.

I don't force myself to walk when the teacher talks for an unexpectedly long time and says, “Oh, that's impossible.” You shouldn't get hurt, and everyone is numb at times like that, so if you don't stand on good terms with everyone, the atmosphere may be better lol but speaking of that, the recovery speed at such times is also much faster than when you were a novice. I wonder if my blood vessels and nerves are getting thicker and my legs are less likely to get numb.

Hello Leon McKee.
My name is Mukazuki.

Actually, I'm not good at sitting upright either.
When I first entered the ascetic dojo, I was numb in less than 10 minutes.
When I work in the morning (morning class), I have to sit up straight for about 1 hour when it's long.
I also had a sprain due to excessive force being applied when standing up.
(It fell in a big way in the main hall. (It's a good memory now...)
I'm still numb. There are times when I put up with losing weight and stand up with a cool face.

I'm not sure about tips for not getting numb, but I'll write how to fix my numbness.
At long memorial services, etc., I pretend to fix my coat and stand on my knees a bit.
Also, anticipate when the end of the memorial service is approaching, and stand on one's toes to relieve numbness.
That way, you can stand up with a cool face.

The monks are human just like everyone else.
My legs are numb, and I also have greed.
But we try to control those things.
I try to control my numbness, greed, and emotions.

Did you find it helpful?
Other than my method, I think there are many other tips.
Please try it out.

Mukogetsu Jiryu Kyuhaku

But I got used to it a lot
About 30 minutes is normal
Somehow I was able to sit up straight for about an hour.
But as soon as you get fat, it quickly becomes difficult to sit upright
I try to be careful about that.

Everyone has their own tricks
Like using a seat chair or rearranging legs so they don't get caught
There seems to be a variety of know-how.

My method
Swap your ankles and multiply your weight before standing up
Daring to cause pain relieves numbness.

It didn't work at first, but then things got better and better.

If you're okay with yourself, the puja will get longer, so you have to be careful.