Infar Red Sauna!
I bought a closet sized unit that you could only sit in, glass door so I could watch TV. This unit was beta test for me….just sitting in there helped , then I got to thinking that being able to stretch in here would be 100x better.
I've recently purchased a 5'x6 and can do yoga in it ( Bikram ) …it's a freaking youth machine.
It's expensive , but worth the money! Who doesn't want to feel 10 years younger.