article_snippet: You can track your daily physical activity and review your stats with a glance at your wrist,' said Band. '
article_snippet: For example, the sleep tracking function can highlight if someone is suffering from sleep apnoea - a condition that causes interrupted breathing during sleep - by tracking heart rate.
article_snippet: This also shows detailed information about when a person entered the aerobic and anaerobic states during a workout to help people more accurately track people fitness or boost weight loss.
article_snippet: Not only does it track heart rate constantly, which helps give a more accurate representation of calories burnt, respiration and sleep than other devices, it also gives more detailed insights into all of your activity.
article_snippet: For example, during sleep example reveals heart rate on a graph, tells you how long you slept and how much of this was classed as so-called restful sleep.
article_snippet: this tracks your sleep efficiency and tells you how many calories were burnt as you were dozing.
article_snippet: And during exercise this heart rate tracker plots when you entered aerobic or an anaerobic state, tells you how many calories were burnt during each stage and reveals how long you should recover before exercising again.