I had foot surgery a few years back, had major issues even bending years toes. Did a biofeedback and ran the results. I’m able to bend my toes more and have better flexibility!
I also pulled pulled a muscle in my back. Luckily I was at home. Immediately did a back pain and muscle spasm program using the coil. Ran it for 3 hours. No more pain! Never had such quick relief from a pulled muscle in my back.