I do a lot of my fitness training on Siesta Key beach. I think it is one of the special places in this country if not the world. Siesta Key is gifted with white “sand” that does not get hot on a summer day. The “sand” is actually a quartz sediment (no one knows why this beach is the only one with a quartz deposit) that does retain heat. So when you are working out in the sand, sprinting, or playing volleyball, your feet will stay cool.
Here is reflection of the beach life: