Hottubs and spas offer three major health benefits. These are massage, heat and buoyancy. These things will greatly help someone with arthritis by exercising and relaxing key muscle joints. The best spas have great Water Therapy features that massage away tight muscles and knots that many people experience after a hard work-out or a long day at the office. The best hot tub I've ever used utilized sounds and colored lights to relieve stress which, to my delightful surprise, actually greatly diminishes insomnia. The benefit that surprised me most, and eventually got me to buy a hottub for my grandmother, was that Water Therapy has a positive effect on Type 2 Diabetics. Diabetics who spend time in a hottub or spa will see a decrease in blood sugar levels, have better sleep, and have a greater sense of well being. Even if you are not a sufferer from any of these ailments, a hottub can be helpful in maintaining a healthy blood pressure, can decrease headaches, accelerate healing times and even help relieve any kind of stress you may have.