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Obstructive sleep apnoea is a condition where the airway to the lungs partially or completely collapses repeatedly during sleep, obstructing breathing and leading to fragmented sleep and a drop in oxygen levels. Airway collapse usually happens as a result of the relaxation of the muscles in the throat, causing them to sag inwards and obstruct the passage of air. After several seconds, the resultant lack of oxygen to the brain stimulates arousal from sleep in order to increase ventilation. In more severe cases of sleep apnoea, this process (called an 'apnoea') can repeat itself between 400-800 times per night.

Aside experiencing from heavy snoring, people with severe obstructive sleep apnoea often perform well below their optimal level. They may wake in the morning feeling extremely tired and lethargic. They often remain sleepy throughout the day, and may fall asleep at inappropriate or dangerous times, such as while driving a car, reading, working, eating or watching television. Perhaps more dangerously, they frequently fail to recognise that they have this problem.

Obesity is among the key causative factors for sleep apnoea. Obesity, particularly around the neck, narrows the upper airways, and places additional pressure on them to collapse during sleep. Losing weight can therefore be one of the most effective ways to combat this condition.

Obstructive Sleep Apnoea