Most commercial flights, however, fly at 38,000 feet above the Class B maximum height and there is not a specific speed limit imposed. BA Captain Dave Thomas stated why they fly at this height: 'This sort of altitude is a good compromise between engine efficiency and aerodynamic efficiency for jet aircraft.
The most common cause of de Quervainâs tenosynovitis is chronic overuse of the wrist. Repetitive movements day after day cause irritation and pain. One common movement that causes it is lifting a child into a car seat. Another is lifting heavy grocery bags by the handles.
Guillain-Barre barrÃ© (syndrome say-GHEE yan-BAH) ray is a problem with your nervous. System it causes muscle, weakness loss of, reflexes and numbness or tingling in your, arms, legs, face and other parts of your. Body this rare condition can cause paralysis and lead to. deathnfections that may trigger Guillain-Barre barrÃ©. Syndrome it usually begins to affect the nerves after'you ve had a viral or bacterial. Infection often it is after an infection of the lungs or stomach and. Intestines infections that may trigger it: 1  Include campylobacter, jejuni which can cause a type of food.  poisoning