Scientist · Author · Athlete & Coach

The work of a life
happens in the other
twenty hours.

Human potential isn't unlocked in the training itself — but in how we recover, sleep, and align with the body's natural rhythms. That's where I work.

Dr. Kristen Holmes
Dr. Kristen Holmes
Global Head of Human Performance & Principal Scientist, WHOOP
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Dr. Kristen Holmes
10 yrs
Building WHOOP's
science from the ground up
About

I've spent my life inside high-performance sport — as a two-sport Big Ten athlete, a seven-year member of the U.S. National Field Hockey Team, and a Division I coach — and then as the scientist testing whether the principles that drove that success hold for everyone else.

As a coach, I refined those principles with one narrow group of athletes. For the past decade at WHOOP, I've been asking a bigger question: do they generalize? Drawing on one of the largest longitudinal physiological datasets in existence, I've studied how the same levers — sleep, circadian alignment, recovery, behavior — shape readiness across Olympians, military operators, surgeons, and ordinary people trying to show up for their lives. The finding is consistent: they do. What works for an elite athlete works, in the same physiological grammar, for the parent of three.

That's why the work translates across elite sport, military, healthcare, and the boardroom. The rare thing I bring is both sides — deep scientific rigor and real coaching experience in high-stakes environments. In 2025 I testified before the U.S. House Ways & Means Health Subcommittee on the role of recovery and preventive health in population outcomes. Whatever the audience, the goal is the same: clarity, grounded presence, and embodied resilience.

PhD, University of Queensland Global Head of Human Performance & Principal Scientist, WHOOP Congressional Testimony, 2025 3 Patents 2× Big Ten Athlete of the Year 3× All-American USA Field Hockey · 7 yrs NCAA National Champion · Head Coach 12 Ivy titles / 13 seasons Iowa Athletics Hall of Fame
What I Do

Rigor, translated into practice.

Three ways the science becomes usable — for organizations building performance cultures, stages that need substance over slogans, and teams that want an edge grounded in physiology.

S / 01

Keynote Speaking

Talks that make circadian science, recovery, and human performance literacy tangible — tuned to elite sport, executive leadership, defense, and education audiences.

S / 02

Scientific Advisory

Designing readiness systems and interpreting physiological data for elite organizations — Ferrari, Paris Saint-Germain, MLB, the EPL, the NBA and NFLPA, and collegiate programs from Florida State to Tennessee.

S / 03

Research & Writing

Dozens of peer-reviewed publications across circadian health, sleep regularity, and women's physiology — three issued patents, and long-form writing that connects the evidence to how we actually live.

Aligned by Kristen Holmes, PhD — book cover
The Book
Coming August 2026 · Avery / Penguin Random House

A data-driven guide to performance, recovery & human potential.

Aligned draws on more than two decades in high-stakes, high-stress environments and insights from one of the world's largest physiological datasets to make a compelling case that recovery isn't a luxury — it's our competitive advantage.

Recovery is not what we do after the work. It is the work.

It shows how to align with your body's natural rhythms rather than fighting against them — a book that feels both rigorous and genuinely useful.

From Aligned
Your body does not run on willpower.
It runs on timing.
Praise for Aligned

What readers are saying.

In a world that rewards urgency and exhaustion, Aligned offers permission to slow down and live with intention. Holmes guides each of us to listen more deeply — to our bodies, our rhythms, and most importantly our values. This book isn't about optimization or achievement; it's about wholeness.

David Perlmutter, MD#1 New York Times bestselling author of Grain Brain and Brain Defenders

Dr. Holmes has written an incredible book that revitalizes the human body and the human spirit. I am thrilled to have her scientific expertise and decades of experience at my fingertips. A must-read for anyone looking to become the most exceptional version of themselves.

Dr. Gabrielle LyonNew York Times bestselling author of Forever Strong

Dr. Holmes bridges something rare in the performance world — deep scientific rigor and real coaching experience in high-stakes environments. In Aligned, she shows that sustainable performance isn't about hype or hacks, but about understanding your physiology, respecting recovery, and building daily habits that compound over time.

Dr. Kelly StarrettNew York Times bestselling author, co-founder of The Ready State

Dr. Kristen Holmes brings us a data-centered approach to total alignment for performance in sports, work, and relationships. Her knowledge and warmth shine through the pages, as if you are sitting across from her in marvelous conversation.

Vonda Wright, MD, MSOrthopaedic surgeon, author of the New York Times bestseller Unbreakable

Aligned is a must-read for anyone who wants to achieve big goals in their life — by harnessing the biology of resilience, stress, and readiness. This is the roadmap for how to outperform yourself.

William W. Li, MDNew York Times bestselling author of Eat To Beat Disease; President, the Angiogenesis Foundation

Aligned makes a convincing case for recovery as the foundation of performance. Dr. Holmes shows how recovery and emotional resilience improve when we work with the body's natural circadian rhythms rather than against them. The result is a book that feels both rigorous and genuinely useful.

Michael J. Breus, PhD, ABSMAuthor of The Power of When
On Air

Conversations & podcasts.

Recent long-form conversations on sleep, circadian science, recovery, and building a life aligned with your physiology.

Booking a podcast or interview? Head to inquiries below.

Selected Research

The evidence base.

2025
Four core circadian behaviors that improve cardiorespiratory fitness through consistent sleepHolmes, K., Kim, J., Fielding, F., … von Hippel, W.
Sleep
2025
Heart rate variability coefficient of variation during sleep as a digital biomarker that varies by age and sexGrosicki, G., Carter, J. R., Laursen, P. B., … Holmes, K.
AJP-Heart & Circ.
2024
Heart and health behavior responses to GLP-1 receptor agonists: a 12-week study using causal inferenceGrosicki, G., Kim, J., Fielding, F., … Holmes, K.
AJP-Heart & Circ.
2025
Inter- and intrapersonal associations between physiology and mental healthPresby, D. M., Jasinski, S., Capodilupo, E., … Lee, V.
JMIR
2023
Connection between sleep and psychological well-being in U.S. Army soldiersHolmes, K., Fox, N., King, J., … Kim, J.
Military Medicine
2023
What happens on call doesn't stay on call: in-house call, surgeons' sleep & burnout (SuPer trial)Coleman, J., Robinson, C. K., von Hippel, W., … Cohen, M. J.
Annals of Surgery

Selected from dozens of peer-reviewed publications. Full list available on request.

Inquiries

Let's work together.

Speaking, media, advisory, or press for Aligned — tell me what you're building and I'll be in touch.

Speaking
Keynotes & panels
Media & Press
Podcasts & interviews
Advisory
Scientific partnership

This opens a pre-filled email in your mail app. Sharing your date and audience up front helps me respond faster — I reply to every serious inquiry, typically within a few business days.