NEW YORK (AP) — Tom McGee began climbing stairs for exercise 20 years ago as part of an effort to stay off cigarettes. It hasn't always been easy: His climbs in hotel stairwells sometimes draw the attention of security guards. “I’ve gotten kicked out of about every hotel in the city,” said McGee, a 69-year-old market researcher who lives near Chicago. Climbing stairs has become increasingly ingrained in exercise guidance, but many people who do it regularly say it can be challenging in...