Use the Force, Yoga 6. A yoga instructor at TCBY (The Country’s Best Yoga, Inc.) believes that yoga benefits aspects of life beyond just physical health. To explore this theory, she organized a study involving 30 participants. The study tracked the number of hours each individual devoted to exercise. Furthermore, participants responded to a self-esteem scale (where higher scores indicate greater self-esteem) a life satisfaction scale (higher scores mean more satisfaction), a stress survey (lower scores signify less stress), and an IQ assessment. Data: Yoga.jasp