The cold plunge mainly used for : -Sleep. Studies testing body heating as a treatment for insomnia in adults found that hot baths significantly affected sleep quality and restfulness. -Stress. A soak in your spa eases tension while bubble jets massage away mental stress to bring a sense of calm and balance. -Clarity. Hot tubs can improve overall circulation, and that includes increasing blood flow to the brain. -Pain Relief -Rehabilitation and Recovery -Calorie Burn