Many clients have trouble battling afternoon fatigue, falling asleep, staying asleep, or having a restful night's sleep. Approximately 33% of the adult U.S. population--about 65 million people--suffer from sleep disorders. One of two people have experienced insomnia. At least 10 million people have sleep apnea, hundreds of thousands have experienced narcolepsy, and approximately 12 million suffer from restless legs syndrome or periodic limb movements during sleep. However, most people with sleep disorders remain undiagnosed and untreated.