Thirty-three studies comprised of 2,384 participants in various populations, including community dwellers, nursing home residents, and those with chronic disease, were identified. Hatha yoga was the foundation of most yoga styles, and Iyengar or chair-based methods were frequently used. Measures of gait speed, handgrip strength, balance, lower-extremity strength and endurance, and multicomponent physical performance were used as single-item frailty markers; no studies included a validated definition of frailty.