It's 8:30 a.m. and the sun is already heating up the artificial turf at Banning High School's football field. Some 70 ninth- and 10th-graders line up on their stomachs for push-ups.
For some of these kids, the "push-up ready" pose looks like a cross between an aborted yoga position and a nap.
"Come on! Butts down, hips off the ground, shoulders over your hand!" barks Los Angeles Fire Capt. Eddie Marez.
"One, sir!" the sleepy students shout.
"Didn't say 'up' yet. Start all over!" Marez yells.