Restless legs syndrome, periodic limb movement disorder, and rapid eye movement Sleepbehavior disorder are common in older adults. These movement disorders can rob you of needed sleep. People with restless legs syndrome, or RLS, feel like there is tingling, crawling, or pins and needles in one or both legs. This feeling is worse at night. See your doctor for more information about medicines to treat RLS. Periodic limb movement disorder, or PLMD, causes people to jerk and kick their legs every 20 to 40 seconds during sleep. Medication, warm baths, exercise, and relaxation exercises can help. Rapid eye movement, or REM, sleep behavior disorder is another condition that may make it harder to get a good night’s sleep. During normal REM sleep, your muscles cannot move, so your body stays still. But, if you have REM sleep behavior disorder, your muscles can move and your sleep is disrupted.