This summer I started training some of my clients in a swimming pool. My clients have enjoyed it and tell me it is more like play than exercise. One of my clients asked 3 of her friends if they wanted to be part of a small group training, so I train them together in one of my client's pool one morning a week.
My clients find that they can do much more in the way of exercise in the water than they can on land. Exercising in the water is kinder to their joints. On days they are stiff or sore, they feel much better after their water workout.
I have decided to become certified in training larger water fitness classes, and I'm currently studying to receive certification. I have purchased 4 new water fitness books (one of which goes along with the certification program).
To make it more challenging and to keep it fresh, I've purchased different types of equipment to add more resistance.