New WHOOP Study Finds: How You Sleep Tonight Shapes How Active You’ll Be Tomorrow

BOSTON, MA — June 30, 2025 — Sleep isn’t just for recovery anymore — it’s a powerful predictor of your activity levels tomorrow. In a groundbreaking new study published in the Proceedings of the National Academy of Sciences (PNAS), WHOOP, in collaboration with researchers from Monash and Harvard University, unveils how the quality and timing of your sleep can shape your physical performance the next day.

Analyzing nearly 6 million nights of sleep data from approximately 20,000 WHOOP members, the research reveals that sleep consistency and duration significantly influence next-day movement, particularly moderate-to-vigorous physical activity (MVPA) — such as running, brisk walking, cycling, and other heart-pumping exercises.

Key Findings: Your Bedtime Sets the Tone for Tomorrow

• Earlier bedtimes are linked with up to 30 additional minutes of MVPA the next day.
• Later bedtimes, even with the same total sleep duration, are associated with reduced movement.
• Sticking to your typical sleep duration results in more activity than sleeping more or less than usual.
• Oversleeping (3–4 hours over baseline) can reduce MVPA by as much as 30%, even if it feels like “catching up” on rest.

From Passive Recovery to Active Preparation

This study introduces a powerful mindset shift: sleep as an activator, not just a metric. It reveals a feedback loop between nightly habits and daily behavior — showing that how you sleep not only affects how you feel, but how you perform and engage with the world.

For WHOOP members, this insight unlocks a deeper level of personalization and behavior change:

• The Sleep Planner helps optimize bedtime aligned with activity goals.
• Journal entries and Recovery Insights uncover personal patterns between sleep and movement.
• The Sleep Performance Score shows how your night’s rest sets the tone for your day.

A Wake-Up Call for Whole-Body Health

Health and fitness have long treated sleep and movement as separate pillars — but the research confirms they’re intimately connected. Whether you’re a professional athlete, a busy parent, or someone simply aiming to move more each day, this data shows a clear takeaway: go to bed a little earlier, and move more tomorrow.

Beyond short-term energy boosts, consistent sleep and movement contribute to long-term health. The WHOOP Healthspan features, including WHOOP Age and Pace of Aging, give members a long-view lens on how nightly choices impact lifetime wellness.

Interview time with WHOOP researchers available upon request 

About WHOOP

WHOOP, the human performance company, offers a wearable health and fitness coach to help people achieve their goals. The WHOOP membership provides best-in-class wearable technology, actionable feedback, and recommendations across recovery, sleep, training, and health. WHOOP 5.0 and WHOOP MG offer groundbreaking health innovations, including cardiovascular health features; Healthspan which quantifies Pace of Aging and provides members with their WHOOP Age; and first-of-its-kind wearable Blood Pressure Insights. WHOOP is the perfect health companion for anyone looking to optimize their health and performance. Founded in 2012, WHOOP is based in Boston and has raised more than $400 million in venture capital. WHOOP is available to ship in 56 markets worldwide and the WHOOP app is available in English, French, German, Italian and Spanish (Latin America). WHOOP can be purchased on Amazon across the U.S., U.K., and Australia, as well as Best Buy (U.S.) Dick’s Sporting Goods (U.S.), Flipkart (India) and Virgin Megastore (GCC), and more.  

To learn more or start a one-month free trial, visit whoop.com and connect with WHOOP on Instagram, X, Facebook, LinkedIn, and YouTube. 

Contacts

press@whoop.com