which was measured with a risk monitor. they evaluated their cognition 11 years later using a bat are you of tests similar to how you might evaluate for alzheimer s. there wasn t association with how long or the quality of their self-reported sleep, buts there was an association with that sleep fragmentation, the number of times you might be waking up in the middle of the night. and sometimes not even realizing it. they found people with the highest sleep fragmentation had two times higher likelihood of performing poorly on cognitive tests 11 years later. while they can t prove there s a cause, that s a strong association to be aware of. i m going to take issue with six hours is only six hours. that s a lot of sleep. i have a tracker that tells me when i m awake or not. what are the best ways to measure that? i talked with spo different