Wearable sensor validation across HR, GPS, SpO2, temperature
Real-world testing across diverse runners, terrains, and weather compares GPS, heart-rate, recovery, and battery performance to reveal where each watch holds up when conditions get messy. Findings show Garmin offers more reliable training data and endurance, while Apple suits those prioritizing iOS integration and everyday smart features.
See how accuracy - not features - has shaped the real story of fitness trackers, from pedometers to GPS and wrist-based sensors. Learn the most common real-world errors, how to assess claims with a field-tested checklist, and what advances could make measurements more trustworthy.
Real-world testing across diverse bodies and conditions reveals where each tracker is truly accurate - Oura for sleep and temperature trends, WHOOP during intense efforts - backed by clear error margins. Use practical criteria to choose based on your routines, skin tone, and environment.
Stress scores from wearables can be misleading without rigorous, real-world validation across diverse users and conditions. Use them as directional trends: set a personal baseline, look for transparent error bars and gold-standard comparisons, and pair insights with simple actions like paced breathing.
