Three running luminaries collaborate here to offer advice and inspiration to masters (40 and over) runners. Journalist Henderson, editor of Runner's World , weaves together insights and personal experiences from Rodgers, perhaps the premier road racer of the 1970s running boom, and Welch, masters competitor extraordinaire . The focus is the aging runner, but the training schedules, nutritional tips, and other suggestions differ little from information found in dozens of general guides. Allan Lawrence and Mark Scheid's Running and Racing after 35 ( LJ 4/15/90) and Hal Higdon's The Masters Running Guide ( LJ 7/90) present comparably specialized treatments. Still, this trio's name recognition and chatty style will generate reader demand.-- Jim Burns, Pompano Beach City Lib., Fla.