Have you ever trusted your Apple Watch to tell you exactly how many calories you burned during a workout — only to feel off about the number later? You’re not alone. A recent study from the University of Mississippi revealed that while the Apple Watch nails your heart rate and step count, its calorie estimates can be wildly inaccurate. That’s a surprising revelation, especially for those of us who rely on this data to stay healthy and, believe it or not, to get better sleep.

So, what gives? And why should a sleep-focused blog like SilentNights care about a fitness tracker’s calorie count? Stick with me here — it all ties together.

The Apple Watch: Almost Perfect But Not Quite According to the MacRumors article, researchers conducted a meta-analysis that gave the Apple Watch high marks for heart rate and step tracking but found its calorie burn numbers could be way off. Considering how many of us check our watches expecting a “truthful” readout, this disparity could lead us to make decisions that affect our energy balance, weight management, and, you guessed it, quality of sleep.

Why Calories Burned Matter for Sleep You might be asking, “How can inaccurate calorie tracking affect my sleep?” Here’s the deal: your body’s energy balance plays a big role in how well and how deeply you sleep. Eating too much or too little, or exercising based on faulty data, can throw off your natural rhythms. For example:

  • Overestimating calories burned might make you eat more than you actually need, leading to indigestion or weight gain.
  • Underestimating might leave you feeling lethargic, anxious, or restless at night.

Poor sleep further disrupts metabolism and affects your ability to recover, creating a vicious cycle. That’s why accurate fitness and health data is more important than just a number on your watch.

So, What Can You Do? First, don’t panic — your Apple Watch is still an excellent tool for heart rate and activity tracking. But it’s wise to take calorie estimates with a grain of salt. Here are some tips to keep your fitness and sleep on track:

  • Focus on how you feel instead of obsessing over exact calorie counts.
  • Use multiple indicators of health like sleep quality, energy levels, and weight trends over time.
  • Prioritize consistent sleep hygiene habits — calm evenings, no screens before bed, and a comfy sleep environment.

If snoring or breathing issues are part of what's disturbing your sleep, then this next bit is for you.

The Missing Piece: Tackling Nighttime Disruptions Like Snoring A common but often overlooked barrier to good sleep is snoring. Not just annoying for your partner but a potential sign of disrupted breathing that sabotages your rest. This can leave you tired regardless of how many calories you burn during the day.

That’s where innovative solutions like those from Snorple come in. Their customizable anti-snoring mouthpiece combines the best of mandibular advancement and tongue stabilizing devices to keep your airway open comfortably. Made with hypoallergenic materials and featuring adjustable settings for a perfect fit, Snorple’s mouthpiece is designed to help you—and your partner—get the restful night you deserve.

Plus, they’ve simplified the customization process using a microwave-ready boil-and-bite system—far easier than traditional methods! With over 100,000 satisfied customers and a 30-day money-back guarantee, it’s a solid option for anyone struggling with snoring-related sleep disruptions.

Bringing It All Together The key takeaway? Technology like the Apple Watch offers amazing insights but isn’t flawless. Balancing tech data with how your body actually feels—and addressing factors like snoring that impact your sleep—can transform your nights.

If you’re curious about how these elements connect, I highly recommend reading the original MacRumors article for the science behind Apple Watch’s fitness tracking quirks.

And if snoring is a barrier in your sleep journey, exploring customizable solutions from companies like Snorple might be the game-changer you need.

What’s your experience been like with fitness trackers and sleep? Have you noticed discrepancies or found tools that truly help you rest better? Drop your thoughts in the comments—I’d love to hear from you!

Remember, the journey to restful sleep is personal and often requires a combination of tools, insights, and a little patience. Here’s to waking up refreshed and ready for anything!