On some level, we all have an inherent curiosity for our fitness data — tangible numbers we can associate with how we feel during a given activity, whether we’re running a marathon or just running late. The problem, however, is that most of us don’t really know what data we want, let alone what to do with it once we’ve got it. We might know that we went for a longer run than normal, but how much stress did that put on the body? How much extra sleep should we aim for to optimize recovery? We might know we didn’t sleep well, but how should that impact how we approach the next day’s training? Having the right data — and knowing how to use it — allows us to quantify how our actions impact our health and wellness so we can perform at a higher level. That’s the focus of WHOOP, a fitness wearable that provides personalized daily insights into how recovered your body is, how much stress you put on your body throughout the day, and how well you slept. Find out more about each category below.

1. Train Smarter: While other wearables mainly track steps and calories, WHOOP takes it up a notch by using a metric they call strain, which looks at physical exertion based on your body’s recovery and heart rate. This helps provide a deeper level of insight to let you know if you’re pushing yourself too hard or not hard enough. There’s even a built-in Strain Coach that provides personalized target strain goals based on your recovery and how much strain you’ve built up that day.

2. Sleep Better: We’ve all been told to aim for 8 hours of sleep, but some nights we need more and some nights we need less; and it’s not always clear which nights are which. WHOOP provides context around how much sleep you need by measuring the quality of sleep you got. By looking at how strenuous your day was and how well you’ve been sleeping, WHOOP’s Sleep Coach recommends an approximate bedtime to aim for in order to recover and perform the next day.

3. Recover Faster: Elite athletes will tell you that your recovery is just as important — if not more so — than your workout, especially if you’re trying to optimize your performance rather than randomize it. But sometimes you don’t really know how your body is feeling, so WHOOP gives you a daily recovery score by comparing your heart rate variability, resting heart rate and sleep to your baseline, letting you know whether you should hit the gym or the snooze button before work.