Wearable Technology for Heart Rate and Energy Monitoring
Summary
Wearable devices have transformed the continuous assessment of cardiovascular and metabolic function by combining miniaturised optical, motion and bioimpedance sensors with advanced data analytics. Early wrist-worn trackers relied on photoplethysmography to estimate heart rate, while tri-axial accelerometers and gyroscopes enabled crude estimations of physical activity and energy expenditure. Recent generations integrate multi-modal sensing—skin temperature, galvanic skin response and barometry—to improve the accuracy of energy-balance metrics. Cloud-based platforms and machine-learning algorithms now personalise physiological models, adjusting for user-specific factors such as age, body composition and environmental conditions. These advances have fostered applications in fitness optimisation, chronic disease management and remote clinical monitoring, with global implications for preventive health and telemedicine.
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Wearable Technology for Heart Rate and Energy Monitoring publication trend
The graph below shows the total number of articles in wearable technology for heart rate and energy monitoring across all publications each year (not limited to Nature Index journals).
Technical terms
Photoplethysmography (PPG): Optical technique that detects blood-volume changes in the microvasculature to derive heart-rate signals.
Indirect calorimetry: Laboratory method measuring energy expenditure through analysis of oxygen consumption and carbon dioxide production.
Ordinary differential equations (ODEs): Mathematical formulations describing the dynamic evolution of physiological variables over time.
Maximal oxygen uptake (VO2 max): The greatest rate at which oxygen can be taken up and utilised during intense exercise, indicating cardiorespiratory fitness.
References
- Wearable technology and the cardiovascular system: the future of patient assessment. The Lancet Digital Health (2023).
- Modeling personalized heart rate response to exercise and environmental factors with wearables data. npj Digital Medicine (2023).
- Keeping Pace with Wearables: A Living Umbrella Review of Systematic Reviews Evaluating the Accuracy of Consumer Wearable Technologies in Health Measurement. Sports Medicine (2024).
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