Short, sweet and to the point: If you need to give your body some TLC, but still want all the great perks of standard exercise, head to the water. (gymjunkies.com)
Before I read that, I was doing standard exercise, I'd run. (blog.bulletproof.com)
If you happen to know your actual maximum heart rate based on standard exercise testing, use those numbers. (lasting-weight-loss.com)