Letter: In Brief

Sir: My parents both took afternoon naps from their late 50s and lived well into old age. The research from Hadassah University Hospital ("A nap after lunch could be fatal", 21 August) appears to overlook one important independent variable: weaker bodies may seek to rest during the day and extend a potentially shorter life. Stronger people may not have the urge to nap, since they do not need it.

JOHN SEWARD

South Croydon, Surrey