I’m in healthcare and on my feet for 12-13 hour shifts. I have had chronic shoulder and upper back pain for 25 years! I had an ACL repaired 7 years ago that still gets swollen, sore and stiff from all the walking and standing. Then a few months ago my lower back started hurting and the older I get the harder it is to recover. So I finally purchased the Lifepro Red light therapy belt and it works great for all three areas! My only regret is not purchasing this sooner. I love the battery pack ability for the on the go! ??