darien sutton. thanks so much for being with us, dr. sutton.syndrome? >> good morning, eva. so p.o.t.s. stands for postural orthostatic tachycardia syndrome. it's a debilitating and relatively common syndrome that involves relatively -- or excuse me, abnormal and significant increases in heart rate when one changes position, for example, when one goes from a seated position to a standing position. for most we don't think about it when we stand up but for those suffering from this diagnosis, the simple act of getting up from a chair can bring about distressing symptoms. >> interesting. so if someone is concerned they may have p.o.t.s., what symptoms should they be looking out for? >> well, majority of these symptoms occur when one, again, is changing positions and they most often come in the morning when people are waking up. symptoms can start out as lightheadedness and confusion, involve palpitations, nausea and even fainting and for many of my patients who get diagnosed with this they often find out or get clues from their wearable technology

darien sutton is here now. and, doc, what can you tell us about his condition?t types this accounts for approximately 10% to 20% and it's due to a progressive brain cell degeneration that can lead to problems with behavior, speech as well as problem solving. and bruce willis being 67 years old is actually a later onset than you typically see for this diagnosis as the majority are diagnosed between the anyones of 45 and 65. >> and what are the typical symptoms? >> it presents in more than one form. one form presents with what we call aphasia or speech difficulty and patients in that realm can present in one of two ways. some patients have difficulty finding words and others slowly lose the meaning of words and additional forms include problems with behavior, changes in personality as well as problem solving issues. >> how is it diagnosed? >> you know, it's diagnosed through extensive neurological exams and testing, but there's also additional testing to rule out the other possible causes of these symptoms. and for some certain mri or brain imaging can show certai

darien sutton is here with what we need to know. dr. . remind us again what exactly cte is and what did this study find? >> good morning, janai. cte stands for chronic traumatic encephalopathy. it's thought that repeated head trauma can have negative effects on brain function which can interfere with normal life presenting with symptoms in mood, behavior and early onset dementia later on in life and this study found the rates of cte were likely significantly higher among professional football players compared to the general population. >> and so you just said that it's higher than the general population. one thing about ctes, dr. sutton, i'm so mystified about, the idea they can only be diagnosed after death. what kind of challenge does that present in trying to study them obviously? >> it's an incredible challenge. and that's why we advocate for the advancement of research and making sure we diversify research and know that black americans in general are 1.5 to 2 times more likely to develop alzheimer's and other related forms of dement

darien sutton, thank you as always for your insight.' day sales are just around the corner and becky worley is breaking down the sales. hey there, becky. >> reporter: robin, good morning. it is hard to find a sales tag or a discount anywhere right now. but presidents' day sales may offer some relief, especially on big ticket items. how to strategize on those and one popular electronics item that is at its black friday price when "gma" continues. when "gma" continues. volunteering there'se at the fire department. there's nothing like hitting the waves. but with my moderate-to-severe eczema it hasn't always been easy,... ...since my skin was so irritated and itchy... ...and even worse with all my gear on. now, i'm staying ahead of my eczema. there's a power inside all of us to live our passion. and dupixent works on the insie to help heal your skin from within. it helps block a key source of inflammation inside the body that can cause eczema. so adults can have long-lasting clearer skin and fast itch relief. serious allergic reactions can

darien sutton has the details so break it down for us. >> good morning, george.00 people and tracked their sleep patterns and more specifically they tracked the difference in the amount of sleep each person got individually from one night to the next and then at the end of the study, they measured everyone for something that we call early signs of cardiovascular disease or plaque within their arteries and found those who had more variability in the amount of sleep they got in one night to the next specifically more than a two-hour difference had up to 40% increased rick of arterial plaque. or early signs of cardiovascular disease. >> that is the magic numbering of hours? >> variable and dependent on your age, under 12 you need at least 12 hours of sleep. it's fundamental and important for growth and development. for teens at least eight to nine hours and then for us adults at least seven hours of sleep. >> what other tips do you have? >> we talked about this before. the biggest thing we've gotten from the study bedtimes aren't just for children. we probably all s