Hi Deb - Yes - What you’ve heard is correct. I use a infrared sauna every morning and it does make a difference in my joints. I feel that they move easy. If I’m stiff in the morning it helps work that out. Have a good weekend and enjoy.

Go for it! For me, my experience with hot springs, hot tubs and worst of all, saunas has not gone well. I found them entirely draining, sucked the air out of me, passed out once, and in general felt wretched.
But that was me. Everyone is different.
Try anything available. You just never know what might work for you. And have fun!