HOUSTON — A good night’s sleep is important for both the body and brain. It’s essential to understand the four stages of sleep and how to get more restful z’s. Stage 1: Transitional sleep The sleep ...

When nights stay warm, the body struggles to cool down, a key signal for drifting into deep sleep. Heat doesn't just shorten ...

Light sleep is the beginning of your sleep cycle and your body's way of winding down. Breathing, heart rate and muscle changes prepare your body for the deeper sleep to come. Light sleep is broken ...

Earlier studies have identified a relationship between sleep and Alzheimer’s disease. A new study looks in detail at sleep phases, brain changes, and Alzheimer’s disease. According to the results, ...

Now that we have wearables tracking our every move, a lot of us can look at stats that supposedly tell us how well we’ve slept the night before. But sometimes, it can feel like your sleep tracker is ...