Functions of Water: 7 Health Benefits Healthy joints need more than exercise, they need hydration! Drinking enough water helps cushion your joints, eases movement, and prevents stiffness. Keep moving comfortably by staying properly Synovial Fluid Definition, Location & Function Lesson Study.com Did you know that water helps to lubricate and cushion your joints, spinal cord and tissues? This is particularly important if you regularly engage in activities that place pressure on your joints.