Wearables that Matter: From Steps to Signals

Counting steps was just the beginning. Wearables that Matter: From Steps to Signals looks at how consumer and clinical wearables evolve from fitness trackers into meaningful health instruments.
This book is grounded in everyday data. It examines how heart rate variability, sleep patterns, movement quality, temperature, and recovery metrics reveal deeper physiological states. The focus is not motivation—but interpretation: how signals become indicators of stress, resilience, and risk.
Rather than promising diagnosis on the wrist, the book explains what wearables can responsibly infer—and what they cannot. It shows why longitudinal trends matter more than daily scores, and why context separates insight from anxiety.
This book reframes wearables by asking:
• Which signals actually reflect health change?
• Why trends beat thresholds
• How wearables support—not replace—care
• When data helps, and when it overwhelms
This book is for users, clinicians, designers, and builders who want wearables to do more than count. If health lives in patterns over time, this book shows how signals start to matter.