Don't just track your steps. Here are 4 health metrics to monitor on your smartwatch, according to doctors.

From smart wearables like the Apple Watch or Garmin trackers to the celebrity-sported Oura ring and trendy WHOOP strap, health tech has come a long way from just tracking your steps.

"There's lots of different metrics now that we can begin to look at," says Dr. Davin Lundquist, family physician and chief medical officer at Augmedix. "Anytime that we can have a greater awareness of our health and paying attention to it, it tends to influence behavior in a positive way."

Here are four that doctors say can be useful to monitor: