Diaphragm training is more effective than exercise alone for improving stability in those with chronic low back pain. If you don’t want to buy a breathing trainer, another way to create resistance (which I did for years with patients) is to inhale through pursed lips or inhale through a straw. This will create natural resistance pressure. Try it now, and see what you feel. Keep in mind that the quieter the inhale, the more diaphragm and less accessory muscle you’re getting. The breathing trainer