in many parts of the world, people take naps in the middle of the day.(a nap is a short, daytime period of sleep.) this is especially the case in a warmer climate, where the heat makes work difficult in early afternoon. researchers are now saying that naps are good for everyone in any climate. first of all, a daily nap means a more rested body and mind and many health benefits. in countries where naps are traditional, people tend to suffer less from stress and stress-related problems such as heart disease. another benefit of taking naps is improved job performance. in jobs where public safety is involved, a nap can make an important difference. studies have found, for example, that airplane pilots make fewer mistakes of they take regular naps.