Since 2008, sleep authorities have simplified sleep stages into 3 categories, SWS (Delta or Deep sleep), Light Sleep, and REM (rapid eye movement or dream sleep). For all of these reasons, SWS or Delta sleep is considered to be the most important stage of sleep. SWS promotes a full night’s sleep, staying asleep with fewer interruptions, thus allowing you to get all of your dream sleep too. Our night’s sleep is organized so that SWS occurs mainly during the first half of the night, and dream sleep during mainly the last half of the night. As a result, we lose our regenerative and restorative capabilities, and ultimately, our health and well-being. By our seventies, we have lost most if not all of our SWS. By the time we reach our mid to late forties, we have lost 60% to 70% of our Delta sleep. Unfortunately, we lose Delta or Deep sleep as we age. Even DNA repair occurs during SWS, as well as enhancing our immune system functioning and even removing harmful material from our nerve cells. This assists in bone growth and overall healing, due to cell regeneration. During this stage of sleep, our deepest stage of sleep, the body isn’t moving, but other important healing processes are at work.įor instance, 80% of growth hormone is secreted during SWS. There is no thinking or worrying about anything. When the brain is generating Delta waves, it is switched off. Delta waves are the slowest brainwaves (< 3.5 cycles per second), which is why Slow Wave Sleep is also referred to as Delta Sleep. Brainwaves are categorized as Delta, Theta, Alpha, Beta, and Gamma. Slow waves refer to the brainwaves that accompany this stage of sleep. My dream is to have two hours of SWS (slow wave sleep) every night, because SWS restores and rejuvenates my body.
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