Yes, it's good to get back to the basics sometimes.  Swimming in clean ocean water is also great for reducing inflammation, getting mineralized, losening back muscles, spinal issues and grounding.

I used to live in the Caribbean in my 20's and I had just started to have back and neck pain, this was the start of my mystery illnesses.  They didn't have a reliable chiropractor on the island then so I would head out to the beach and swim in the surf for about 30 mins.  Worked like a charm.  Pain would vanish, tightness would go, I could move my neck again.

I love the ocean:) No machine will ever replace nature, that's for sure.

HappyManatee