Have you ever wondered how much your smartwatch really knows about you? In this episode, we dive into the groundbreaking study “Beyond Sensor Data: Foundation Models of Behavioral Data from Wearables Improve Health Predictions” to see how a foundation model built on behavioral data from wearables can revolutionize medicine.
From the first moments, we’ll explain why familiar metrics like “steps” and “heart rate” are just the tip of the iceberg. The new approach combines information about your actions and habits—step count, walking speed, active energy burned, sleep duration, even VO₂ max—analyzed not by seconds but over weeks and months, making health prediction far more accurate and meaningful.
➡️ What you’ll learn in this episode:
Why a simple global-average imputation outperformed more complex methods for filling in missing data
How Mamba 2 (a state space model) beats transformers when processing continuous behavioral streams
How WBM was trained on 2.5 billion hours of data from the Apple Heart and Movement Study (AHMS) with 162,000 participants
When behavioral data outperforms classic PPG models and where they work best together
✨ Why it matters:
If you’re exploring wearable technologies, predictive health analytics, or just want to understand how AI can personalize your health monitoring, this episode delivers actionable insights. We’ll cover real-world cases: from better sleep detection and early infection warnings to ultra-accurate pregnancy prediction with ROC > 0.9!
❓ Questions for you:
Have you noticed your habits change when you’re sick or stressed?
How do you think combining behavioral and physiological data will shape the future?
🎯 Call to Action:
Subscribe so you don’t miss upcoming episodes on health tech innovations, leave your observations in the comments, and share this episode with anyone who wears a smartwatch!
Key Points:
Introduction of the Wearable Behavioral Foundation Model (WBM) and the distinction between behavioral data and low-level sensor signals.
Two surprising findings: simple TST tokenization for missing data and Mamba 2’s superiority over transformers.
Synergy of behavioral and PPG data yields the best results in health-prediction tasks (sleep, infection, pregnancy, etc.).
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