Welcome Back to the WHOOP. Podcast's Science of Human Performance Podcast. This week WHOOP Global Head of Human Performance and Principal Scientist Dr. Kristen Holmes sits down with WHOOP SVP of Research, Algorithms, and Data Emily Capodilupo for a deep dive into the science behind the WHOOP Sleep Score and the habits that have the biggest impact on restorative sleep.

Emily explains why sleep consistency is one of the strongest predictors of performance, recovery, and long-term health, and walks through the four metrics that make up your WHOOP Sleep Score: sleep duration, consistency, efficiency, and sleep stress. Together, Dr. Holmes and Emily unpack how nutrition, exercise, alcohol, stress, and your daily routines influence sleep quality, share practical strategies for falling asleep and staying asleep, and discuss how poor sleep can sometimes be an early signal of underlying health issues.

Whether you're looking to better understand your WHOOP data or simply wake up feeling more rested, this episode offers a science-backed framework for building healthier sleep habits that last.

01:11 How WHOOP Built The Sleep Algorithm

02:17 The 4 Pillars of Sleep: Duration, Consistency, Efficiency, & Stress

03:20 The Secret To You Best Night’s Sleep: Sleep Consistency

08:06 Sleep Efficiency Explained

11:38 Impact of Alcohol on Sleep Quality

18:01: How Your Day Shapes Your Night

19:34: Exclusive Offer For WHOOP Podcast Listeners

20:07: How Sleep Stress Impacts How Rested You Feel

24:08: Is Your Sleep Normal?

25:48: Why Sedatives Don’t Actually Make You Sleep Better

26:59: Defining and Combatting The 2 Types of Insomnia

28:57: Light Timing: Benefits of Red Light Therapy on Sleep

30:57: Winding Down Before Sleep: Breathwork & Stress Reduction

34:07: Understand Your Health with WHOOP Advanced Labs

34:41: Impact of Exercise on Your Ability to Fall Asleep

42:40: How to Prepare for Sleep & Stay Asleep

44:28: What Your Lab Results Can Tell You About Sleep

53:40: Creating Contrast Between Day and Night

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Welcome back to the WHOOP Podcast How To Series! This week, Global Head of Human Performance Principal Scientist Dr. Kristen Holmes sits down with double-board certified physician, nutritionist, and gut health expert Dr. Amy Shah to teach you how to fix your gut through nutrition and lifestyle behaviors. Gut health is essential for energy, recovery, and immunity, making it a critical component for overall health and longevity. Dr. Shah reveals the powerful connection between gut health, hormones, and brain function, along with the tools and framework you need to impact your overall performance. The conversation dives into science-backed strategies to help optimize your health from the inside out. From fiber intake to morning sunlight, meal-timing, and movement, this episode will teach you how to fix your gut health in a matter of days.

(01:01) Introducing Dr. Amy Shah, Gut Health Expert
(02:56) Dr. Shah's Career:
(10:43) What Is The Gut-Brain Connection?
(15:21) Where To Start When You Experience Low Energy
(21:07) Exclusive Offer For WHOOP Podcast Listeners
(21:40) The Universal Rules of Gut Health
(24:36) The 30-30-3 Diet: The Nutrition Guide For Your Gut
(30:18) Exercise's Influence on Gut Health
(35:11) Fiber: The Secret Ingredient To Longevity
(37:23) How The Gut Helps Hormone Regulation
(38:14) Protecting The Immune System
(43:17) Refer A Friend To WHOOP
(43:54) Reducing Inflammation (And How WHOOP Coach Can Help)
(46:03) The Impact of Alcohol on Gut and Brain Inflammation
(50:17) Can Spending Time In Nature Improve Longevity?
(53:37) Does Food Timing Really Matter For Overall Health?
(01:04:07) WHOOP Advanced Labs
(01:04:42) Do GLP-1s Impact The Gut?
(01:09:53) Intermittent Fasting: Online Fad or Recommended Path to Wellness
(01:16:43) Where To Start: Dr. Shah's Best Advice For Regulating Your Gut
(01:18:05) Thanks For Listening!

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Welcome to the Science of Human Performance Series where we are breaking down the key metric for you to improve your fitness. This week, we’re unpacking Strain with WHOOP Global Head of Human Performance, Principal Scientist Dr. Kristen Holmes and WHOOP Staff Research Scientist Dr. Greg Grosicki. Together, Dr. Holmes and Dr. Grosicki explore how both cardiovascular and musculoskeletal load are taken into account when measuring a member’s daily strain to help balance training, recovery, and build long-term fitness. The conversation explains the influence of WHOOP Strain on overall fitness goals, from improving fitness to supporting weight management, and increasing VO₂ max. This episode will give practical guidance on your training routine, helping you build the habits necessary for performance, healthspan, and longevity.

(00:00) Looking To Gain Fitness? WHOOP Strain Can Help

(01:25) What is Strain?

(02:07) How Does WHOOP Measure Strain?

(03:21) What Is The Neuromuscular System – Why Does It Matter For Strain?

(03:57) How Does WHOOP Measure Musculoskeletal Load?

(08:09) Creating Impactful Strain Recommendations: WHOOP Coach

(11:16) Exclusive Offer For WHOOP Podcast Listeners

(11:50) Why Is Strain Measured on a 21-Point Scale?

(16:37) The Power of Consistency: Improving Fitness By Following Strain Coach

(23:21) Refer A Friend: Get 2 Months Free!

(23:56) Is Strain The Biggest Lever For Improving Cardio Health?

(24:57) How To Improve Strain (Habits For Busy Individuals)

(27:03) Focussing on Heart Rate Zones

(29:32) What Does VO2 Max Tell About Strain?

(32:21) Building A Fitness Routine: Is Changing Strain Activities More Effective?

(39:06) Exclusive WHOOP Advanced Labs Offer

(39:40) Can You Still See Fitness Gains With High Strain & Low Recovery?

(41:01) Greg & Kristen’s Go-To Strain Activities For Fitness

(44:50) Thanks For Listening: New Member Offer & WHOOP Apparel & Accessories Discount

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