Just back from 10 days in Tenerife and...
No aches or pains. My elbows all eased and even my bad knee has improved ( helped by a big cushion to rest it in bed at night ) and I ended up doing around 12 km walking every day.
Because of there being no pollution.. my lungs cleared and I felt normal. It was good being able to have the sun and to breathe properly + have a few drinks. It would be cheaper if we were all prescribed a few weeks in the sun each year!! I m going to go back in November .