Did you know your joints are mostly water? Just like an engine needs oil to run smoothly, your joints need water to stay lubricated. Hydration helps maintain the volume of synovial Joint Maintenance for Active Adults Preventative Gel Injections Joint Relief Institute Joint Health and Hydration: Why Staying Hydrated Keeps You Moving Smoo WaterH 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.