34. Fix Hidden Sleep Issues, Supercharge Recovery & Upgrade Your Health

Sleep isn't just about rest, it's a critical pillar of metabolic health, cognitive function, and longevity. Poor sleep quality is linked to increased risks of cardiovascular disease, diabetes, neurodegeneration, and even cancer. In this episode of Extend, I break down how tracking your sleep can uncover hidden disorders, optimize recovery, and improve long-term health. I'll share my personal struggle with undiagnosed sleep apnea and how data-driven sleep optimization completely transformed my energy, metabolism, and resilience. We'll discuss the key warning signs of sleep disorders, including excessive daytime fatigue, morning headaches, and snoring, and why conditions like sleep apnea go undetected for years. Understanding sleep quality requires more than just tracking hours slept. I'll explain the most critical sleep metrics, sleep efficiency, deep and REM sleep cycles, HRV (Heart Rate Variability), and nighttime oxygen levels, and how they reflect nervous system balance and recovery. We'll also explore cutting-edge sleep tracking tools like Oura, Whoop, and advanced mattress sensors, plus at-home sleep studies for diagnosing apnea risk. If you're serious about health and longevity, sleep tracking is non-negotiable… Tune in to learn how to upgrade your sleep and unlock peak performance! I Also Discuss: (00:19) Unlocking Better Health Through Sleep Monitoring (05:23) Snoring vs. Sleep Apnea: How to Identify the Warning Signs (07:27) The Best Sleep Trackers and What Your Data Actually Means (09:09) Key Sleep Metrics: Sleep Stages, HRV, and Sleep Efficiency Explained (11:39) Unlocking Your Highest Sleep Potential Learn more about Dr. Shah: Website: https://www.drshah.com/ Clinic: https://www.next-health.com/ Instagram: https://www.instagram.com/darshanshahmd/

Speaker names marked ? are inferred from speaking time and the show’s known hosts — they are not voice-verified.

• 0:03Dr. Darshan Shah?

  Welcome to Extend with me, Dr. Darshan Shah, a podcast dedicated to cutting-edge science, research, tools, and protocols designed to help you extend your health span. Having become one of the youngest doctors in the country at the age of 21, and trained and board-certified at the Mayo Clinic, I've accumulated three decades of practice as a board-certified surgeon and longevity expert. Over that time, I've discovered that a mere 20% of health knowledge yields 80% of the results when it comes to your health span. We're living in a new era where we are creating a new healthcare system, no longer focused on disease management, but achieving optimal health and vitality. Join me as I interview world-renowned experts, offering you a step-by-step guide to proactively avoid disease, and most importantly, extend your health span.

• 0:50Dr. Darshan Shah?

  Hello, you're listening to the Extend Podcast. This is your host, Dr. Darshan Shah. We're going to break down the science, health, and optimization plans that you can use to help you live your best life through sleep. Today, I'm going to be talking about one of the most overlooked key powerful levers for health and performance that you have. It's your sleep. You've probably already heard that sleep is important, but do you really know how well you're sleeping? And more importantly, do you know what your sleep data is telling you? Today, I'm going to dive into the world of sleep monitoring and how you can use it to unlock better health, energy, and longevity, but also how looking at the data can really help you diagnose whether you have certain sleep issues, such as sleep apnea. Sleep was always an afterthought in my personal life.

• 1:33Dr. Darshan Shah?

  I'd spent years in my surgical training being taught that sleep was for the weak. The more you could learn to survive in just three to four hours of sleep, the more successful that you would be as a surgeon. That's what I was taught. My wake-up call came when I started waking up in the middle of the night, gasping for air, and waking up every morning already tired and unable to face the rest of the day. I really had no idea what was going on. Over time, this became worse and worse. I would wake up exhausted every single day. I'd barely be able to make it through the day without two to three cups of coffee. Then I drank until about 3:00 P. M. Luckily, a close friend of mine, who was ear, nose and throat surgeon, noticed me constantly cat-napping in between my surgical procedures. He asked why I was so tired all the time.

• 2:17Dr. Darshan Shah?

  I told him I couldn't catch my breath at night. He insisted at that moment that I get checked for a condition called sleep apnea. It took me a year to finally schedule that sleep study. I avoided it and I just didn't want to do it. I didn't want to go to the sleep study center where you have to spend the night with wires hooked up to you. But finally, the effects were so bad of the sleep apnea that I just had to go get checked. The results were actually shocking. I had one of the worst cases of sleep apnea that they had ever seen. I was at a significantly increased risk for Alzheimer's, heart attack, arrhythmias and even cancer due to my poor sleep. I started using CPAP machines that I was prescribed by my sleep specialist. And during the time I was on CPAP, which was about six months,

• 3:01Dr. Darshan Shah?

  I made major changes to change my lifestyle. Because I was sleeping better, I was able to eat better and control my appetite. I was able to go to the gym and get workouts in. I lost 50 pounds and optimized my sleep routine by wearing a sleep tracker. And at that time, the Oura Ring had first come out, and that's what I was using. I completely changed my life by getting my sleep in order. Sleep apnea is a serious condition that affects millions of people worldwide. It often goes undiagnosed like it did for me for years and years. It occurs when the airway becomes mechanically blocked during sleep due to a collapse of the tissues in the back of the throat onto the windpipe when you're in a laying down position. This leads to repeated episodes of oxygen deprivation to your brain,

• 3:45Dr. Darshan Shah?

  to your heart and to all the tissues of your body. This disruption can cause significant health consequences, including high blood pressure, insulin resistance, which leads to metabolic disease and diabetes, cognitive decline, and an increased risk of stroke, and other heart issues like arrhythmias, like atrial fibrillation. If you leave sleep apnea untreated, you will not only have diminished sleep quality, but you're also going to shorten your lifespan. There are many studies linking sleep apnea to heart attacks, atrial fib, diabetes, all the things I talked to you about. In fact, there was a large 2021 meta-analysis that was done in multiple studies of 34,000 patients. It showed a 15% increase in developing cancer with sleep apnea.

• 4:29Dr. Darshan Shah?

  Now, this was a huge wake-up call to me, that lack of sleep can actually lead to cancer. That's a massive increase. The effect of sleep apnea compounds night after night, week after week, year after year. So it's incredibly important to get it treated as soon as possible. So, six months after treatment, with CPAP and weight loss, my sleep apnea and my snoring both were completely gone. Through this experience, I discovered the Pareto Principle of Sleep. What was the 20% of information that makes all the difference for your sleep? It's that everyone to spend at least six weeks on a sleep monitoring device of any kind. It's critical, in my opinion, not only to detect serious sleep conditions like sleep apnea, but also to understand sleep disturbances as a whole

• 5:14Dr. Darshan Shah?

  that are occurring to you specifically, and assess whether you're getting good sleep or not. So let's take a pause here and talk a little bit more about snoring. Snoring and sleep apnea often go hand in hand, but they're confused because they are completely different and not the same. Snoring is a common condition caused by the vibration of tissues in the throat due to a partial airway obstruction. This can be somewhere in your throat or even your nose. While snoring can be harmless, it can also be a sign of obstructive sleep apnea if it's accompanied by choking, gasping, or pauses in your breath. Not all snores have sleep apnea, but many individuals with sleep apnea do snore. So if you or your partner notice excessive snoring, it's important to do some further investigations

• 5:58Dr. Darshan Shah?

  to rule out the health risks of sleep apnea. I actually really like this app called SnorLab, L-A-B, that listens to you as you sleep. It gives you a snore score every morning that you can see how much you've been snoring. And it even records your snoring. You can see how alcohol, late-night meals, and using your phone late at night can affect your snore score. A very high snore score should be an indication to you that there might be another reason to go get checked for sleep apnea. Another useful tool for identifying sleep apnea risk is a STOP-BANG test. This is just a simple questionnaire test used by sleep specialists to see what your risk for sleep apnea is. STOP-BANG stands for snoring, tiredness,

• 6:41Dr. Darshan Shah?

  observed apnea, high blood pressure, BMI, age, neck circumference, and gender. These eight factors come together to get you a score about your likelihood of getting sleep apnea. If you have a score of zero to two, it means you are low risk. Anything above three indicates that you are a moderate risk and should get checked for sleep apnea. But if you're five, you probably definitely have sleep apnea, and you should be getting a sleep study. If your score is in the moderate to high range, a sleep study is usually indicated. And this is so much easier than when I got it done. There's a new ring called the Happy Ring that performs a sleep study at night with just a ring on your finger. It's incredibly useful. There's also another device called a Watchpad,

• 7:26Dr. Darshan Shah?

  which is a little watch that you wear with a pulse oximeter on it that also records measurements overnight. Lots of easier ways to do it. You don't need to go to a sleep center unless there's other indications for it. Okay, so let's talk about the basics of sleep monitoring. Tracking your sleep is like having a personal trainer for your recovery. Without measuring your sleep, how do you know if you're truly resting well? Devices like the Oura Ring, which is what I wear, the Whoop Band, and the Fitbit provide insights into your sleep patterns. There's also mattress pads that you can place under your mattress or under your sheets if you don't like wearing something at night when you're sleeping. A new bed called the Eight Sleep Bed, which I'll have a link in the show notes to, can also monitor your sleep

• 8:10Dr. Darshan Shah?

  while changing the temperature of your bed based on your sleep cycles. In summary, there's a lot of different ways to track your sleep. Just pick one and stick with it. Let's first talk about the sleep stages. This is one of the data points that you're going to get from your sleep monitoring device. You have light, deep, and REM sleep stages, and all of these are essential for recovery and cognitive function. Light sleep helps with basic bodily functions and acts as a transition between sleep cycles. Deep sleep is crucial for muscle repair, immune function, and physical recovery. REM sleep, which is where dreaming occurs, plays a role in memory consolidation, learning, and emotional regulation. A lack of deep sleep can impair physical healing and immune function.

• 8:53Dr. Darshan Shah?

  An insufficient REM sleep can lead to cognitive decline and emotional instability. So, all of these different sleep stages are important. Most people will get more deep sleep at the beginning of the night and more REM sleep towards the end of the night. That's why it's always recommended to get at least seven hours of sleep so you can get all of these sleep cycles in. The next data point you're gonna get is something called sleep latency. This is the amount of time it takes you to fall asleep. And ideally, you should be doing this in 10 to 20 minutes. If you're falling asleep within minutes, like, super quickly, it indicates that you're chronically sleep deprived. Whereas if sleep latency is prolonged, it might suggest an issue with your sleep environment, your stress levels,

• 9:35Dr. Darshan Shah?

  your circadian rhythm, or you're just on your phone way too late at night. Another data point that all these variables give you is your heart rate recovery, or HRV. A high resting heart rate during sleep can indicate stress, overtraining, or underlying health conditions. While a low HRV can suggest poor recovery and autonomic nervous system imbalance. A well-recovered individual typically has a lower sleeping heart rate and a higher HRV, reflecting good cardiovascular and nervous system function. HRV is a new and really great marker of overall recovery, not just for during your sleep, but also throughout your day. Next, we look at sleep efficiency.

• 10:17Dr. Darshan Shah?

  This is a measure of how much time you're spending in bed actually versus tossing and turning versus sleeping. A high sleep efficiency score means that you're sleeping really well and sleeping soundly. This is usually above 85%, whereas a low score can indicate fragmented sleep, insomnia, or disruptions from environmental factors like noise or temperature fluctuations. You wanna have the best sleep efficiency so that the seven to eight hours you do spend in bed, most of that time is actually spent going through sleep cycles. Some of the things that can affect your sleep efficiency is waking up in the middle of the night and going to the restroom. We're gonna talk about all of these different factors in the future solosodes of this podcast.

• 10:59Dr. Darshan Shah?

  Finally, some sleep trackers do also track your oxygen levels. This is a critical marker for detecting issues like sleep apnea. Oxygen saturation, also known as SpO2, should generally stay about 95% during sleep at sea level. If you're sleeping in the mountains, it'll be a little bit lower. Frequent drops in oxygen levels can indicate airway obstruction like sleep apnea, and it can lead to fragmented sleep and long-term health risks, as we've talked about earlier. Understanding these metrics helps you make informed decisions about your lifestyle and habits. You can argue as much as you want about the accuracy of these devices, but the reality is that as the technology and algorithms improve, so does the accuracy.

• 11:44Dr. Darshan Shah?

  And at the minimum, they are really good at looking at where your overall sleep is headed on averages and trends to understand what is affecting your sleep positively or negatively. Once you have the data on your sleep, what you can do is start making changes. And this is where the power of N of 1 experiments comes in. Small changes in your routine and sleep environment can lead to massive improvements over time. Our next few solosodes will also talk about the specifics of these experiments and how you can make them very helpful. So, in summary, if you dedicate just six weeks to tracking and optimizing your sleep, you can expect increased energy and focus, better metabolism and weight management, reduced risk of chronic disease, stronger immune function and less getting sick,

• 12:29Dr. Darshan Shah?

  and finally, better mood and mental health. By treating sleep as the superpower that it is, you're setting yourself up for long-term health and performance. If I could go back in time and change one thing about my early career, who would be prioritizing my sleep from the start? So take this challenge, spend the next six weeks tracking your sleep, make small improvements and watch how your life transforms. Sleep monitoring isn't just about looking at numbers. It's about unlocking your highest potential for your sleep. Your sleep is your foundation for your day. Getting a good night's sleep often leads to better dietary choices, less stress, more physical activity, and a positive direction in your health and your mood for years and years to come.

• 13:12Dr. Darshan Shah?

  If you found this helpful, or if you know someone that snores, please share this episode with them, and please follow my podcast, Extend. Thank you.

• 13:23Dr. Darshan Shah?

  Thank you so much for listening to the podcast today. Please remember to subscribe if you liked this episode and give us a good review and share a link with your friends. It really helps to support all of our efforts. I also want to remind you that the information shared on this podcast is for educational purposes only and is not intended to replace professional medical advice, diagnosis, or treatment. Please consult with your healthcare provider or physician before making any decisions or taking any action based on what you hear today, especially if you have any underlying health conditions or on any medications. Your doctor knows your personal health situation the best and it's always important to seek their guidance.