What Gets Measured Gets Improved: Sleep, Recovery & Peak Performance with Dr. Kristen Holmes

Host Andrea Samadi revisits a 2021 conversation with Dr. Kristen Holmes (VP of Performance Science at WHOOP) to explain how measuring sleep, recovery, and strain transforms performance and resilience. The episode emphasizes that small daily habits in downtime—sleep, HRV, hydration, and strategic movement—create a sustainable competitive advantage.

Practical tips include tracking one recovery metric, building a shutdown routine, auditing downtime choices, prioritizing consistent sleep, and balancing strain with recovery so you can train smarter, reduce stress, and improve focus and wellbeing.

For today's EP 390, we cover:

✔ What “What gets measured gets improved” really means for performance

✔ How sleep, recovery, and strain work together as one system

✔ Why recovery—not effort—is the true driver of results

✔ The hidden cost of high strain without adequate sleep

✔ How to use data to match your effort to your recovery capacity

✔ The difference between training harder vs. training smarter

✔ Why shorter, intentional workouts can outperform longer sessions

✔ How wearable data (like WHOOP) builds awareness and better decision-making

✔ The connection between overtraining, inflammation, and performance plateaus

✔ How to create sustainable performance through balance, not extremes

Welcome back to Season 15 of the Neuroscience Meets Social and Emotional Learning Podcast.

I’m Andrea Samadi, and here we bridge the science behind social and emotional learning, emotional intelligence, and practical neuroscience—so we can create measurable improvements in well-being, achievement, productivity, and results.

When we launched this podcast seven years ago, it was driven by a question I had never been taught to ask— not in school, not in business, and not in life:

If results matter—and they matter now more than ever—how exactly are we using our brain to make these results happen?

Most of us were taught what to do. Very few of us were taught how to think under pressure, how to regulate emotion, how to sustain motivation, or even how to produce consistent results without burning out.

That question led me into a deep exploration of the mind–brain–results connection—and how neuroscience applies to everyday decisions, conversations, and performance.

That’s why this podcast exists.

Each week, we bring you leading experts to break down complex science and translate it into practical strategies that we can all apply immediately.

Season 15 we’ve organized as a review roadmap, where each episode explores one foundational brain system—and each phase builds on the one before it.

Season 15 Roadmap:

Phase 1 — Regulation & Safety Phase 2 — Neurochemistry & Motivation Phase 3 — Movement, Learning & Cognition Phase 4 — Perception, Emotion & Social Intelligence Phase 5 — Integration, Insight & Meaning

PHASE 1: REGULATION & SAFETY

Staples: Sleep + Stress Regulation Core Question: Is the nervous system safe enough to learn?

Anchor Episodes

Episode 384[i] — Baland Jalal How learning begins: curiosity, sleep, imagination, creativity Episode 385[ii] — Bruce Perry “What happened to you?” — trauma, rhythm, relational safety Episode 387[iii] Sui Wong Autonomic balance, lifestyle medicine, brain resilience Episode 389[iv] Rohan Dixit HRV, real-time self-regulation, nervous system literacy Episode 390 Dr. Kristen Holmes (Whoop) Recovery Metrics, physiological readiness Episode 391 Antonio Zadra Sleep, dreaming, REM Integration

EPISODE 390 — Dr. Kristen Holmes Recovery Metrics, physiological readiness.

In Phase 1: Regulation & Safety, we are asking one essential question: Is the nervous system safe enough to learn?

And today we cover this topic as we travel back to May 2021 for EP 134[v] when we first met Dr. Kristen Holmes, the VP of Performance Science at Whoop. Back then, I had just turned 50 and purchased the Whoop wearable tracker to help me to improve my weakest link (at the time): Sleep.

For today’s EP 390 —

We revisit this earlier episode with Dr. Kristen Holmes and her work that centers on one powerful truth:

What gets measured gets improved.

In our original conversation, we explored sleep, recovery, and strain — and how understanding your body’s data can transform performance, health, and resilience.

This episode bridges physiology and performance — showing how awareness becomes optimization. A lot has changed with the Whoop wearable device in the past 5 years and you don’t need to use a wearable to tune into our conversation, to see how we can improve YOUR weakest link (once you have discovered what it is).

🎥 CLIP 1 — Kristen Holmes

In this first clip from our 2021 interview, I brought up a powerful idea I had heard Dr. Holmes say:

“It’s what you’re doing in your spare time that gives you your competitive advantage.”

This concept has stayed with me. For years!

Because most people assume it’s the hard training — the workouts, the grind — that creates results.

But after wearing the Whoop device for the past 5 years, I’ve seen something very different.

It’s the behaviors outside of the workouts — it’s sleep, recovery, daily habits — that have had the biggest impact on my health and performance.

Dr. Holmes expanded on this, explaining that even at the highest levels of sport, this is what separates people.

It’s not just how you show up in your craft — it’s how you show up in your downtime.

Are you prioritizing sleep? Are you fueling your body properly? Are you managing stress with practices like meditation or non-sleep deep rest?

She calls this “the cross we all bear.”

Because these choices aren’t always easy — but they are what determine whether we can show up fully present for what matters most.

And ignoring them?

That’s where we miss the opportunity for real growth.

Looking back at my decision to purchase the Whoop wearable device when I turned 50 was one of the best decisions I’ve ever made. Nothing is left to chance. I’m no longer guessing. I chose to dive into my data with this device, but you can still gain incredible insights from using a wearable, or just by listening to your body. Here are some of the key take-aways from Clip 1.

🔑 Key Takeaways — CLIP 1 with Kristen Holmes

Your competitive advantage is built in your downtime It’s not just what you do during performance — it’s how you recover, reset, and prepare outside of it.

It took me years to truly balance strain with rest… and we’ll go deeper into that in the next clip.

Qs for the Listener:

Do you know when your body can push harder, and when to rest? When you are resting, are you fueling your body, preparing for the next push? What can you do to improve your health in your downtime?

These are all great questions that will give you your own competitive advantage whether you are an athlete, or a regular person (like me) who just wants to optimize their performance.

Recovery drives performance — not just effort Sleep, HRV, and nervous system balance determine how well your brain and body perform the next day.

With Whoop, you can actually see this:

Green → capacity to push Yellow → proceed with caution Red → prioritize recovery

Your HRV score feeds into this — giving you a daily signal of when to push, and when to pull back.

Qs for the Listener:

Do you monitor your HRV[vi]? We have covered this topic often if you want to review past episodes (most recently EP 389 with Rohan Dixit, and EP 228). There’s many ways to monitor this number. The Gold Standard way is with an electrocardiogram, or you can use your smartphone with various apps, or choose a wearable device like the Whoop or Oura Ring.

Small daily habits compound into measurable results What (and when) you eat, how you sleep, alcohol use, and stress levels — they all show up in your data.

I log everything… and over time, the patterns do become clear.

When you see what hurts your recovery, it becomes much easier to change it.

And for the things you can’t remove — like stress — you can offset them.

That’s where tools like:

meditation breathing non-sleep deep rest

become powerful.

High performers are disciplined with recovery At elite levels, the difference isn’t effort — it’s consistency in habits.

For me, improving sleep was the starting point.

If this is an area you want to optimize, Dr. Matthew Walker’s[vii] work on sleep is a great place to begin.

You can’t ignore physiology and expect optimal results If the body isn’t supported, the brain can’t sustain:

focus decision-making emotional control

This is why we begin with Phase 1: Regulation & Safety.

Because when these systems are aligned, everything else becomes possible.

And over time — with small, consistent steps — you can completely transform your results.

Let’s take a closer look.

✅ Practical Tips — Put This Into Action

Track one recovery metric daily Start simple: sleep duration, HRV (you can easily find a device that measures this metric), and eventually you can learn to guess this number by how rested/alert you feel when you wake up. → Awareness is the first step to change. Build a “shutdown routine” at night Create a consistent wind-down:

Lower lights No screens 30–60 min before bed Breathing or NSDR (non-sleep deep rest) → Signals safety to the nervous system

Audit your downtime honestly Ask:

Does this activity help me recover or drain me? → (Alcohol, late nights, scrolling vs. sleep, reading, recovery)

Prioritize sleep like you prioritize work Aim for:

Consistent sleep/wake time 7–8 hours minimum → This is your #1 performance lever

Add one daily regulation practice Choose something simple:

5 minutes of breathing Go for a walk outside Meditation → Builds resilience under pressure

Think in terms of “energy management,” not time management Protect your energy the same way you protect your schedule.

Over time, you will notice small changes yield incredible results.

🎥 CLIP 2 — Kristen Holmes

In this second clip, Dr. Holmes expands on what it really takes to build a competitive advantage.

She explains that if we truly want to live aligned with our values — with energy, focus, and joy — there are a few non-negotiables we can’t ignore.

At the top of that list?

Sleep.

But just as important (as sleep) is understanding how to balance two key variables:

Strain — your cardiovascular load and Recovery — your body’s capacity to take on that load

This is exactly what the Whoop device measures:

your strain your recovery and your sleep

And as Dr. Holmes puts it — these aren’t optional.

They’re foundational to being human.

Because without understanding these signals… we’re not optimizing — we’re guessing.

And that’s where the opportunity is.

She’s always viewed technology not as a distraction — but as a tool to enhance human performance, well-being, and overall thriving.

And while we often associate “performance” with elite athletes…

this applies to all of us.

Anyone who wants to reach their potential — needs to start measuring what matters.

So if these are the non-negotiables…

the next question becomes:

How do we actually use this data to make better decisions each day?

Let’s explore that next.

🔑 Key Takeaways — CLIP 2 with Kristen Holmes

There are non-negotiables for living at your potential If you want energy, focus, and joy — you can’t ignore the foundational behaviors that support the brain and body. Sleep is the #1 performance driver Everything starts with sleep. Without it, recovery, cognition, and emotional regulation all suffer. Performance is a balance between strain and recovery

Strain = the load you place on your system Recovery = your capacity to handle that load

Real growth happens when these are aligned.

Without data, you’re guessing If you’re not measuring sleep, recovery, or strain — you’re relying on how you feel, which is often inaccurate. Technology can enhance self-awareness and performance Tools like Whoop aren’t just for athletes — they help anyone understand their body and make better daily decisions. Human performance applies to everyone This isn’t about elite sport — it’s about showing up with energy and clarity for your life, work, and relationships.

✅ Practical Tips — Put This Into Action

Identify your “non-negotiables” Start with:

Sleep Recovery habits Movement

Ask: What are 2–3 things I will protect daily, no matter what?

😴 SLEEP — Building the Foundation

Improving my sleep started with one simple question:

Where is my weakest link?

For me, it was clear — I wasn’t getting enough sleep.

Living in Arizona, I’ve always woken up early to beat the heat and get exercise out of the way early. But over time, I realized that consistently cutting my sleep short was creating sleep debt that I wasn’t recovering from.

So I made a small adjustment.

A few days each week, I allow myself to sleep in a bit longer — and that alone has helped me start closing that gap.

When I look at my past month of sleep scores, I can see the pattern clearly:

I rarely hit “optimal” sleep (85%+) Most nights fall in the sufficient range (70–85%) And some still drop into poor sleep (<70%)

But the difference now is awareness.

If I see a low score, I make the effort to recover — even something as simple as going back to sleep or adjusting my next day.

And while I’m starting with the basics — sleep quantity — there’s more to it.

Dr. Matthew Walker highlights four key areas:

Quantity (how long you sleep) Quality (how well you sleep) Regularity (consistent sleep/wake times) Timing (when you sleep)

🔑 Reflection Question

So here’s something to think about:

Do you know where your weakest link is when it comes to sleep?

Because once you identify it — you can start to improve it.

🔋 RECOVERY — Managing Stress & Capacity in Your Day

Looking at my recovery data, one thing I’ve noticed from tracking this data is this:

When my stress levels are lower… it’s much easier to stay in the yellow (34–66%) or green (67–99%) recovery range.

But add higher stress — and that’s when I start to see more red (1–33%) scores.

So instead of ignoring stress — I’ve focused on offsetting it.

Here’s what I’ve added to my schedule to support recovery:

Infrared sauna (daily) — helps me feel better to reset Red light therapy to help whatever body parts hurt Getting outside in the morning to sleep better at night Hydration — especially after exercise Meditation + deep breathing

These small, consistent habits help bring my system back into balance. And this is still a work in progress for me. Always looking for NEW ways to offset stress.

And what’s interesting is this:

I learned that we don’t need perfect conditions to improve recovery.

I recently listened to Dr. Andrew Huberman’s Podcast[viii], where he explained that the benefits of deliberate heat exposure or using a sauna (that include increasing heat shock proteins at certain temperatures—that help offset stress levels) that this practice doesn’t require actually having access to a sauna.

He explains that you can create a similar effect simply by: → exercising with extra layers → raising your core body temperature intentionally

It’s about understanding the principle — not just the tool, and then making the principle work FOR you. I often see people hiking or running in Arizona in hot temperatures, wearing lots of clothing and I understand this concept now.

🔑 Reflection Question

So here’s something to think about:

What could you add to your daily routine to better support your recovery?

Because once you understand what impacts your system… you can begin to intentionally regulate it.

🏃‍♀️ MOVEMENT (DAY STRAIN) — Finding the Balance

This was one of the hardest areas for me to figure out.

Whoop calls it Day Strain — your cardiovascular load for the day.

And what I started to notice was a pattern:

The harder I trained… the more sleep I needed.

And when I couldn’t get that sleep —(because I had to wake up early and scrimp of sleep) I wasn’t recovering.

It became a cycle:

Too much strain + not enough sleep = poor recovery

Over and over again. I did this for years and had no idea how to change this.

I need movement to function — but too much intensity, too often, was actually working against me.

I even saw this reflected in my bloodwork.

When I uploaded my labs into Whoop, some biomarkers showed inflammation, confirming what the data was already telling me:

I was pushing too hard, too often. I knew this by just tuning into my body, but again, had no idea how to change this until I realized that I had to actually CHANGE what I was doing.

And here’s what surprised me most:

It wasn’t about pushing harder.

It was about being more strategic.

One day, I walked my dogs for an hour along a canal near my house — wearing a weighted vest.

And during that walk, I hit:

Zone 4 (80–90%) even Zone 5 (90–100%)

Something I didn’t always reach… even during longer 3-hour hikes. It was just a few minutes, but for me, accessing these zones is really difficult.

That really surprised me.

Because I had always assumed that I had to push harder.

But the data showed something different. I could exercise at a lower intensity, (on these walks) and that would move the needle for me with my daily strain, without having to go ALL OUT.

I also noticed something interesting when comparing hikes here in Arizona.

My strain was actually higher on longer (but easier) trails like Telegraph Pass at South Mountain…where there are some uphills, and then long trails without much incline than on shorter, more intense hikes like Camelback Mountain, which is known for its difficulty, and straight up and down trails.

It made me realize:

It’s not just about how hard something feels in the moment — it’s about how your body is responding over time.

And that’s where tracking becomes so valuable.

Because it shifts you from guessing…

to actually understanding what’s driving your results.

That changed everything.

Because it showed me:

You don’t need extreme workouts — you need the right dose of intensity. And this dose is different from person to person.

Now I think about it like this:

I just need to hit about 20 minutes/week in Zone 4–5 (higher intensity) Combined with consistent movement in Zones 1–3 (like daily walks) for an hour or so each day.

That balance (understanding how much ALL OUT I needed) helped me to hit my goals — without compromising recovery.

🔑 Reflection Question

So here’s something to think about:

Do you know how much time you spend each week in:

Zones 1–3 (low to moderate) vs Zones 4–5 (high intensity)?

Because once you understand your balance… you can start to train smarter — not just harder.

🎙️ REVIEW & CONCLUSION — EP 390 with Kristen Holmes

As we reflect on this episode with Kristen Holmes, one message stands out clearly:

What gets measured… gets improved.

And more importantly—

What gets ignored… gets left to chance.

In Clip 1, we explored a powerful idea:

Your competitive advantage isn’t built during performance.

It’s built in your downtime.

In your sleep. In your recovery. In the small daily habits that most people overlook.

In Clip 2, we went deeper.

We uncovered the non-negotiables for living at your highest potential:

Sleep Recovery And the balance between strain and capacity

Because without understanding these… we’re not optimizing—

we’re guessing.

And what this episode shows us is something even more important:

This isn’t just for elite athletes.

This is for anyone who wants to:

think clearly perform consistently and show up fully present in their life

When I look back at my own journey over the past 5 years using data to guide my decisions…

Everything changed when I stopped asking:

“How hard can I push?”

…and started asking:

“What is my body actually capable of today?”

That shift—from pushing harder… to aligning better—

is where real, sustainable results begin.

🧠 Final Takeaway

This is Phase 1.

Regulation and Safety.

Because before we optimize performance… before we talk about mindset, focus, or productivity…

The brain and body must be supported.

And when they are?

You don’t just perform better.

You recover faster. You think clearer. You live with more energy, intention, and control.

🔑 Final Reflection

So here’s something to think about:

Where is your weakest link right now?

Sleep? Recovery? Or movement and strain?

Because once you identify it… you can begin to improve it.

In 2021, my weakest link was sleep. Since then, I’ve worked hard to improve this metric, and while it’s not my strength (yet), I’m miles ahead of where I was 5 years ago. My weakest link now is very clear, (strength training).

But what I do know, is that what is measured, improves.

Stop guessing.

Start measuring.

And begin to aligning our daily behaviors with how our brain and body actually work.

We’ve spent this episode understanding how to support the brain…by measuring certain data.

But what happens after we do?

What is the brain actually doing while we sleep?

That’s where things get fascinating. Next week we will close out Phase 1 on Regulation and Safety with sleep scientist, Antonio Zadra, who brings us full circle.

EP 391 — Antonio Zadra

We’ll review our conversation from Jan 2021 EP 104[ix] where we explored why the brain dreams —and how sleep helps integrate learning, solve problems, and sparks creativity.

This episode reminds us:

Insight isn’t forced — it emerges when the brain is given the space to connect.

We’ll see you next week for the final episode of Phase 1 — Regulation and Safety…

as we complete the foundation for everything that comes next (Phase 2-5).

RESOURCES:

Watch the full interview from 2021 here https://www.youtube.com/watch?v=TOgivjYhhW8

Clip 1 https://www.youtube.com/shorts/Lg7FiWJKZc4

Clip 2 https://www.youtube.com/shorts/OjJDdmkyhqk

REFERENCES:

[i] Neuroscience Meets Social and Emotional Learning Podcast EPISODE 384 “How Learning Begins in the Brain: Sleep, Safety and Curiosity (Revisiting Dr. Baland Jalal) https://andreasamadi.podbean.com/e/hypnagogic-genius-capture-your-best-ideas-at-the-edge-of-sleep/

[ii]Neuroscience Meets Social and Emotional Learning Podcast EPISODE 385 “Safety First: Why a Regulated Brain is the Key to Learning” (Revisiting Dr. Bruce Perry) https://andreasamadi.podbean.com/e/safety-first-why-a-regulated-brain-is-the-key-to-learning/

[iii]Neuroscience Meets Social and Emotional Learning Podcast EPISODE 387 with Dr. Sui Wong https://andreasamadi.podbean.com/e/your-eyes-the-brain-s-early-warning-system/

[iv]Neuroscience Meets Social and Emotional Learning Podcast EPISODE 389 with Rohan Dixit https://andreasamadi.podbean.com/e/breathe-to-reset-how-hrv-tech-reveals-hidden-stress/

[v]Neuroscience Meets Social and Emotional Learning Podcast EPISODE 134 with Dr. Kristen Holmes “Unlocking a Better You: Measuring Sleep, Recovery and Strain.” https://andreasamadi.podbean.com/e/kristen-holmes-from-whoopcom-on-unlocking-a-better-you-measuring-sleep-recovery-and-strain/

[vi] Neuroscience Meets Social and Emotional Learning Podcast EPISODE #228 Review of Heart Rate Variability https://andreasamadi.podbean.com/e/brain-fact-friday-review-of-heart-rate-variability-the-most-important-biomarker-for-tracking-health-recovery-and-resilience/

[vii] Dr. Matthew Walker on The Science of Better Sleep https://www.youtube.com/watch?v=106zCmbMKYY

[viii] The Science and Health Benefits of Deliberate Heat Exposure by Dr. Andrew Huberman https://www.hubermanlab.com/episode/the-science-and-health-benefits-of-deliberate-heat-exposure

[ix]Neuroscience Meets Social and Emotional Learning Podcast EPISODE 104 with Sleep Scientist Antonio Zadra on “When Brains Dream” https://andreasamadi.podbean.com/e/sleep-scientist-antonio-zadra-on-when-brains-dream-exploring-the-science-and-mystery-of-sleep/