Unlike most westerners, it seems that most Koreans do not seek a sun tan. Good for them! I'm sure they have low rates of skin cancer.
The primary manifestation of this trait is that, on sunny days, you will see many women carrying umbrellas. In Insadong one day, I saw this being taken to an almost humorous extreme -- the umbrella taxi. As part of a performance art piece in 2005, for a few won, one was able to hire a person to carry an umbrella for you and keep you shaded as you walk down the street. Pretty clever.
Many westerners believe Koreans are not as large as Americans because of the foods they eat. While this may be partially true, Koreans are also crazy about fitness. On weekends, you will see young and old crawling all over steep mountain peaks. Many of the mountains have leveled-off areas with outdoor weight benches and other fitness equipment. Some of these areas also contain busy badminton or tennis courts. The Han River is lined with people walking, roller blading and playing basketball & soccer.
The edges of the city have a few long-range archery venues, a Korean tradition dating back to prehistoric times. Koreans are so good at archery, in 2004 Korea won its 11th straight women's individual Olympic gold medal in the sport!
Ordinary, many Koreans take the Oriental medicinal herbs for medical cure or build oneself up by taking tonics