Philip C Cheng, PhD

Struggling with weight loss? A sleep researcher explains why there is a direct link between too little or too much sleep and issues with weight management.

Warm weather calls for vacations, outdoor fun and late-night festivities, which can affect your sleep. Here's how to keep your summer shuteye on track.

From changing hormones to the weather, there are a variety of factors that can make it hard to get going in the morning. Two experts explain.

Tossing, turning and staring at the clock in the middle of the night? Here are do's and don’ts to sleep more soundly.