I've been suffering from lower back pain and hip pain since last year.
I think the futon probably doesn't fit.
If your back hurts, you will no longer be able to hold back after about 20 minutes of practice.
This will make you unable to be passive.
It's very, very tough.
As a countermeasure, I ordered a True Sleeper.
First of all, I conclude that I need to get my sleep.
If we keep on practicing like this and get even more hurt, it would be counterproductive.
So I decided to take a good rest today.