At least 2 cancer centers that I’m aware of include laughter as therapy. They have studies showing that laughter is a good therapy for curing or sending cancer into remission.
Laugh on FreeQs. I have also read that laughter is beneficial in weight loss and heart issues tho that has not been official studies I’ve seen. Does make sense in both cases.
Prov 17:22
I’d read about/seen video of something in India called the laughing yoga - a few dozen people would meet in the park and a leader would lead them in group laughing. It must be just the same as you describe. I thought it was one step too silly for me, but maybe there’s something there.
When I worked with different therapies through PTSD and panic attacks, I was taught some breathing techniques that helped immensely. I was told that the common technique (breathe in deeply, hold it, breath out) that most people use when instructed to, "Just breathe!" does not work when in the midst of a panic attack. The one that works is called a "Breath of Fire" which is almost like a dog panting, or a Lamaze breath. You breathe in as much as you can, then force the breath out hard in short, sharp bursts, like you're panting, and force it out hard until you are completely out of breath. The feeling in the diaphragm is similar to what happens after you have laughed until you cannot breathe.
I was told this breaks up the clenched energy being stored in the solar plexus, whereas a long, slow deep breath in and out can actually add more tightness to the energy blocked there. (If you've ever experienced a panic attack, you'll know if feels like your chest is clenching and you cannot breathe.)