Sleep and mood

Why sleep is the lead indicator most apps miss — and how to track it.

• Sleep and bipolar: the earliest warning signal worth watching

  Sleep changes are one of the most consistent early-warning signs of a bipolar mood episode. Here is what the research shows and how to track it.

  2 min

• Sleep restriction therapy and bipolar disorder (carefully)

  Sleep restriction therapy is a real treatment for insomnia. For bipolar disorder it is a tool to use only with clinical supervision. Here is why.

  3 min