"Boston Celtics forward Paul Pierce spent Saturday morning leading more than 300 children in fitness exercises to kick off the "Million Hour Challenge," an initiative that asks 2,000 children from Massachusetts to complete a million hours of physical activity over the next year.

"What we are trying to do with this program is to give a template for other players around the league so they can do it in their city and take it national," said Pierce, who launched the "Truth on Health" campaign through his foundation to encourage children to lead healthier lives. "We have a lot of different pro athletes, not just basketball players, who are interested."

By Saturday evening, Pierce was getting his own workout, playing in a charity game organized by teammate Rajon Rondo. For now, that's been the extent of competition for Pierce and his Boston Celtics with the NBA lockout lasting longer than 4½ months. And no one can be sure when it will end."