Isaac Herrera, 14, has already gotten his hour of daily exercise in by the time the final school bell rings each day. Like most freshman students, he is enrolled in physical education and spent fourth period doing push-ups and jogging around the gym.
But another workout is waiting for him at 6:30 p.m., when Lodi High School's junior varsity basketball practice begins. Herrera thinks two rounds of exercise in a day might be too much.
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