For stiff shoulder joints, use were distributed stretch. It risk turning into a vicious cycle if it's watch outdoors. I don't know if you've ever noticed how tired you feel when you're sunburned. The pain tends to increase when you relax and sometimes you will find lower back pain as well. https://www.evernote.com/shard/s420/sh/1f1188fb-4261-6216-4672-1ade31f238f1/xFe0ZLANR1Tmq1Az8DI7kDRgohtg2M84ghIby1FYl4rb-Zck8k_vleIktQ