Single-lead electrocardiogram captures precise heart rhythm and R-R intervals, enabling accurate heart rate variability analysis to classify sleep stages from real cardiac physiology.
Dual-wavelength optical sensing measures heart rate and blood oxygen saturation continuously through the night, working alongside ECG for reliable sleep stage detection.
A 6-axis accelerometer and gyroscope tracks body movement and orientation during sleep, detecting restlessness, position changes, and distinguishing light from deep sleep.
Skin temperature trends confirm sleep onset and stage transitions — core body temperature drops as you fall asleep and rises before natural waking, providing a reliable physiological signal.
Living With Shift Workers: The Impact on Partners
Shift work is often talked about as a job pattern, but the impacts of shift work extend far beyond the time on the clock.
How Can Wearables and Health Analytics Better Accommodate Shift Workers?
Wearables and health apps are often marketed as tools to help people sleep better, feel better, and build healthier routines.
Understanding the Evidence Surrounding Sleep Coaching
The strongest evidence for sleep coaching comes from Cognitive Behavioural Therapy for Insomnia (CBT-I), which has been shown to produce moderate to large im...
The Importance of Sleep Scheduling for Shift Workers
Shift work disrupts the body's circadian rhythm and is associated with significant health risks.
The Challenge of Measuring Long-Term Fatigue
Fatigue is widely recognised as a major safety issue in shift-work professions, but measuring it directly remains challenging.
Scrutinising Common Consumer Wearable Marketing Claims
An umbrella review from the University of Dublin demonstrates that consumer wearables can create measurable value, particularly in narrowly validated areas s...
Quantifiable Evidence for Smart Wakeups
Smart wakeups target sleep inertia, the period of reduced alertness immediately after waking.
Why Consumer Smartwatches Fall Short for Sleep Management
Most consumer wearables measure heart rate using photoplethysmography (PPG).
How Accurate is Single-Lead Electrocardiography (ECG)?
ECG measures the electrical activity of the heart, providing a direct visualisation of cardiac function.