Seasonal affective disorder (SAD): is depression, often accompanied by sleep disturbance, that begins or is exacerbated during the parts of the year with little sunlight.. A light box (sometimes ...

In addition to helping you count steps and keep track of your heart rate, your FItbit is also a full-featured sleep tracker that’s easy to set up and use. Sleep experts note that sleep trackers can ...

I’m a personal trainer who's tested products for five years. The best fitness trackers are supposed to enhance your fitness journey, not make it harder. But tracking and interpreting your health data ...