The biggest thing that you can proactively do to help with low back tension is to stretch it to loosen up both before and after exercise. The hip flexors, hamstrings, and quads are all very important muscle groups to stretch out if you are having low back pain.
When that pressure builds up on your discs they spread out to irritate your nerves, which leads to low back pain. Think of the discs like balloons, when you squish a balloon the air relocates and that is what is happening to your discs in your back.
If you have other questions check out our website at healthsourcechiro.com/marshall or to set up an appointment to see if we can help call 507-337-2423.
Based on what you are describing it sounds like a lack of core balance and tight hip flexors which stretch out when you are laying on a harder support like the ground.
We focus on fixing that by stretching, then strengthening and stabilizing the surrounding tissues of the lumbar joints after an adjustment.
Check out our facebook page for tips and tricks you can do with stretching and to set up an appointment call 507-337-2423 as the purpose of that first visit is to make sure we can help!