Most of today's top fitness trackers and fitness watches offer sleep tracking functionality. Whether you're a Fitbit, Garmin, Apple Watch or Oppo Watch person, you'll be able to record how well you've slept over the course of the night.
Most commercial fitness trackers break things down into simple scores, like the ratio of time spent awake, in light sleep and deep sleep. That's all well and good, but how can you actually use this information?
To start with, there's no qualms about accuracy. Commercially-available fitness trackers like those from Garmin are "closer in approximations to self-reported sleep outcomes than a previously sleep research-grade device" according to a study from the University of Nebraska (opens in new tab). Which means the tool on your wrist is as good a fitness tracker, or better, as the ones used by actual scientists to monitor sleep in clinical studies.
So, one of the best ways to look at your sleeping patterns is to keep a food diary for a week and compare the results with your sleep tracker. Did you have a large pizza and a few beers on a Friday?
You might have slept worse because of it: alcohol not only interferes with our sleep, but it also acts as a diuretic, which can drive us to need a wee in the middle of the night. Likewise for stimulants like coffee and soft drinks: in the evening, we often forget drinks like cola contain caffeine.
On the other hand, if you ate a healthy dinner and a glass of water, or drank a herbal tea before going to bed, your fitness tracker might show you slept better. By identifying potential cause-and-effect relationships in your diet, you can begin to "hack" your diet to produce better sleep.
The same applies to your exercise schedule. Does your fitness tracker report more, or less sleep if you exercise in the evening compared to the morning? A report from Harvard University (opens in new tab) suggests that you can exercise in the evening as long as you avoid vigorous activity for at least one hour before bedtime.
You can begin to conduct little experiments on yourself with this data, designed to identify the different things interfering with your sleep. Whether it's a late cup of coffee or time spent scrolling on your phone, by recording your habits and comparing them to your sleep tracker's data, you'll be able to identify what's interfering with your bedrest.
Liked this? Check out more Wellness Week content below:
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- How to make sense of the stats on your fitness tracker: the ultimate guide to monitoring your health
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Wellness Week is brought to you in association with Wiggle (opens in new tab). Each day this week, we'll help you accelerate your wellness journey by making improvements across areas including fitness, diet and nutrition, mindfulness and more.
Matt Evans is an experienced health and fitness journalist and News Editor at Fit&Well, covering all things exercise and nutrition on the Fit&Well website. Matt originally discovered exercise through martial arts: he holds a black belt in Karate and remains a keen runner, gym-goer, and infrequent yogi. His top fitness tip? Stretch.
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