In some ways, Mary Still is a typical weight-loss success story. She changed her eating habits, started working out and dropped 82 pounds in a year.

What sets Still apart is that she and her husband, Ed, who has lost nearly 100 pounds, get most of their exercise at work. They visit an on-site fitness center almost daily, meet co-workers outside to walk through landscaped grounds and take wide, airy stairs instead of elevators.

That is exactly what their employer, Sprint Corp., intended when it moved its thousands of employees to a 200-acre campus in suburban Johnson County.

Sprint is part of a small but growing movement among businesses that are constructing or renovating buildings in ways that motivate -- or require -- employees to get more exercise. The premise is simple: Happier, healthier employees are more productive and reduce health care costs for their companies.

"Fifteen years ago, when you designed or developed an office building, everyone was concerned with making everything as convenient as possible," said Phil Dordai, a principal with Hillier, the Princeton, N.J., architectural firm that designed the Sprint campus. "The logic of what's important in design has shifted a bit to making people more active."

At Sprint, that meant putting parking garages around the campus, rather than next to buildings. Covered walkways link all 21 buildings; conference rooms and the four cafeterias are spread across the campus.

Other amenities include the three-story fitness center, a gymnasium, four courtyards with fountains and waterfalls, two jogging trails, an amphitheater, an eight-acre lake, recreation fields, an indoor winter garden and on-site retail stores.

"Those were the general strategies we used to make people walk a little bit more," Dordai said. "We designed around the pedestrian, rather than the car. You don't need to park right in front of your building. If people have to walk a little farther to get to their building or their meeting, that's not a bad thing."

A similar idea took hold when the Robert Wood Johnson Foundation decided to expand and renovate its headquarters in Princeton. The company put its major meeting room at one end of the building and its food service and fitness center at the other, requiring employees to walk to those magnet areas. A walking trail also was installed.

"The vision was to have a healthier people, which leads to healthier teams and more productivity," said the foundation's Peter Goodwin. "And in the long term, having a healthier workforce does address your bottom line by controlling benefit costs."

The idea of encouraging more workplace movement is spreading steadily, sparked in part by the obesity epidemic, said John Pangrazio, president of the American Institute of Architects' Academy of Architecture for Health.

His architectural firm, NBBJ in Seattle, has worked in the United States and abroad to promote healthier workplaces.

"If you want to encourage people to walk from point A to point B, it has to be an interesting and rewarding experience," he said. "That requires covered walkways, water, something to look at. There are ways to manipulate the experience so people want to do it. Otherwise, it doesn't work."

And even the best plans go only so far in changing habits, Dordai said.

"We're in the business of creating the opportunity for those things to happen," he said. "You can't force people to get up and move more if they don't want to."

Sprint Vice President Faye Davis acknowledged that many employees were not thrilled with the layout when the company first consolidated more than 35 sites scattered around the Kansas City metro area.

Sprint makes provisions for people who are disabled, pregnant or otherwise unable to make the walks. Otherwise, Davis said, she has stopped feeling sorry for people who complain about the walking.

"Ninety-nine percent of them are fine with it," she said. "You are always going to have that sliver of discontent. I just think it's good for them."

The fitness center on the Sprint Corp. grounds in Overland Park, Kan., is among the ways the company encourages its employees to stay in shape.Parking is remote from the buildings to encourage foot traffic. Jogging trails, a lake and retail stores are also found on the 200-acre property.