After 30 seconds slowly lower your body forward and to the outside of your left leg, keeping your left arm fairly straight as you do. When you reach your lap remain there for another 10 seconds, release the pressure but rest there for another 30 seconds. Then reverse your hand positions and do your right side.
Inhaling a high concentration of natural gas can lead to asphyxia, the symptoms of which include fatigue and chest pain. Asphyxia occurs when your body is deprived of oxygen, and the more carbon monoxide there is present in the air, the less oxygen you'll be able to inhale, which can potentially kill you.
Carbon monoxide is a poisonous gas that has no smell or taste. Breathing it in can make you unwell, and it can kill. Carbon monoxide (CO) is sometimes referred to as the silent killer. Every year in the UK, over 200 people go to hospital with suspected carbon monoxide poisoning, which leads to around 40 deaths.