With your purchase of a spa, you haven't just bought a hot tub. You've made an investment in bettering your health and your lifestyle. Slip into a steamy, bubbling hot tub for your daily dose of calm. You'll find this routine will help relieve stress, help you sleep better and promote family togetherness. Hydrotherapy also has a variety of benefits for those of us who have muscle sprains and injuries, arthritis or according to a new study, even Type 2 Diabetes.