I have returned from my holiday in Tenerife having had a wonderful time. I did make it to the top of the chair lift on Mt Teide after an interesting journey up the mountain. I don't think I suffered from altitude sickness although after about 10 steps outside the lift I had to sit down. There was not enough air getting to my brain! I made it all they way round the station, not very far, with rests now and then and there have not been any after effects. When we got down again the air felt quite thick but this could have been imagination. Apart from the sun and sea the main benefit for me was walking along the promenade everyday getting far more exercise than I normally do at home. The seashore is up and down whereas I live in the flatlands of an estuary so I do not normally walk up hills every day. Despite three cooked meals a day and some red wine I have come home two pounds lighter and fitter.