Message boards Jobs at Tribune Full search Science of spring fever comes to light Ellen Nash combats a case of spring fever by doing some work outside the Gleacher Center. Ellen Nash combats a case of spring fever by doing some work outside the Gleacher Center. Generally spotted in listless, lazing souls on warm, sunny days like Thursday, spring fever is caused in part by daylight and the subsequent chemical changes that take place in the body, according to chronobiologists, who study the relationship involving a person's body clock, mood and behavior. Increasingly, scientists are finding that many biological and behavioral processes follow daily, monthly and yearly cycles. Luke's Medical Center.
Some people get winter-depressive and hypomanic in spring and summer.
During spring, the period between the vernal equinox and the summer solstice, people living in the northern hemisphere generally feel more energetic, enthusiastic and amorous, while at the same time listless and restless. A man's sperm count is higher. It's easier to lose weight, and many people walk around randomly smiling at strangers. Marketers love spring because consumers are more likely to buy diet and fitness products, beauty treatments, car maintenance and home improvement items, according to a recent survey by American Demographics Magazine. After a morning of meetings in a windowless, basement room in Chicago, she fled outside to read a five-year strategic report for the National Restaurant Association in the sun.