Hi DjJax33
Like you, I too suffered with back problems when I started to meditate.
5 years ago I was in the belief that if I couldn’t sit on the floor cross legged I wasn’t going to meditate. After many false starts and frustration I came up with a plan.
First I brought a good quality Zafu cushion and a Zabuton the sitting mat which the Zafu, is placed on. You don’t have to buy these you can improvise with good hard-foam and a folded blanket. I then went to a store and brought two hard foam wedges.
I picked a quiet spot in the house and declared it as my own country and set up a meditation area.
Then like HazelKay mentioned for the chair, I sat on the mat and cushion just an inch from the wall, where my knees couldn’t touch the floor, I wedged under the foam wedges. I then covered my lower half with a blanket and began to meditate. The transformation was gradual, 5 mins sitting upright without support and the remainder of the session against the wall.
To cut a long journey short. As my posture relaxed so did my back and legs, the wedges got smaller and the sessions longer. Within a one year I was sitting Burmese style with just the Zafu & Zabuton, I can remain in that position, as long as required, 40mins, 1hr 2hrs + without any discomfort.
For you breathing problem, it does seem unusual, but I believe it is caused by tension, just try tensing your upper body, really tense, then hold the tension and take a deep breath. Hard isn’t it?
During meditation, breathing should be calm and relaxed; there should be neither tension nor any struggle. I believe you may be trying to force your breath in and out. Maybe see a physician to clear you of any phyiscal problem
One of the best breathing techniques is simple, breathe out only, the body will breathe in...Or breathe in only the body will breathe out. No need to force anything.
If you read you initial post again, you can feel the tension, try letting the feeling of failure of posture not interfere with the meditation, although this is easier to say than do.
Remember meditation is a lifelong practice, no rushing required
