Research
Adherence
Device error in heart rate measurement is significantly higher in males, individuals with darker skin tones, and those with higher BMI compared to females, lighter-skinned individuals, and lower BMI individuals.
If you have darker skin or a higher BMI, be aware that your wrist-worn heart rate monitor may be less accurate. Use the data as a general trend rather than an exact number, and verify with manual pulse checks if necessary.
GoodQualifiesHIGH confidence
Device error was higher for males, greater body mass index, darker skin tone, and walking.
Why this rating
Statistically significant associations found via regression analysis in a diverse cohort.
Source
Accuracy in Wrist-Worn, Sensor-Based Measurements of Heart Rate and Energy Expenditure in a Diverse Cohort
Anna Shcherbina et al. · Journal of Personalized Medicine · 2017
DOI 10.3390/jpm7020003
cross_sectional · n=60Cited 627×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
Related findings · Adherence
- Regular physical activity (at least 150 minutes/week of moderate-intensity) reduces all-cause and cardiovascular mortality by 20-30% and lowers the risk of type 2 diabetes by 25-35%.Strong
- Increasing physical activity from a sedentary lifestyle to an active one in middle adulthood significantly reduces the risk of coronary events compared to remaining sedentary.Strong
- Resistance exercise is the only intervention capable of consistently restoring muscle function and strength in sarcopenia, partially overcoming age-related anabolic resistance.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →