R e ax Rocking chairs ease the stresses and strains of modern life. 5 OC Ke 1 'thing pretty? If you aren't, maybe you need to slip into the cradle-like embrace of an old-fashioned rocking chair. America's favorite piece of to-and-fro furniture is cozy and promotes tran- quility, and there's nothing better for a bad back or a grouchy disposition. In fact, it could save your life. Ac- cording to E. R. Tichauer, professor of human factors at New York Univer- sity, New York City, a "bad" chair causes a range of health problems, from simple muscle stiffness and migraine headaches to eye problems and stress-related ills, including an increased risk of coronary heart disease. At the very least, it places pressure on the lower back that is twice as great as standing. A "good" chair, like the rocker, is fairly straight and supports the small of your back, improves posture, and adds an hour or more of productive time to your day — the equivalent of 30 extra days a year. (If you feel better, you work better, according to Tichauer.) And all the best people — from Ben Franklin (rumored to be the ori- ginator) and Arthur Godfrey to LBJ have placed their pos- and JFK teriors in a rocker when the going got tough. Why not you? 20 HOME BY FRANCES SHERIDAN GOULART Here's what's nice and what's necessary: • The notion of a chair in motion came into its own in the mid-18th cen- tury. Originally, rockers were just straight chairs to which rockers, or runners, were fitted. These conver- sions are easy to spot: to maintain the height of the seat, the legs had to be shortened to compensate for the height of the runners, which often ended up slightly too close to the lower side stretchers. • A genuine rocker was, and still is, crafted from some plain, strong wood. Boston rockers are recogniz- able by their hand-stenciled decora- tion and painting, and more elegant versions are occasionally found in mahogany with Empire styling. • The Boston rocker is a good buy if it's sturdily built, has good height, a high back and, more importantly, a solid no-nonsense seat that curves down at the front and up at the rear. A good reproduction is your second best bet. • There's a world of difference be- tween a pseudo rocker and a real one. "Conversions" (or "refitted chairs," as they're called) are not as sturdy, and plenty of them are still around because so many were con- Photo By Craig Terkowitz