Bob Orozco barks out instructions like a drill sergeant. The 40 or so older adults in this class follow his lead, stretching and bending and marching in place.
It goes like this for nearly an hour, with 89-year-old Orozco doing every move he asks of his class. He does that in each of the 11 classes he teaches every week at this YMCA in Laguna Niguel, Calif.
"I probably will work until something stops me," Orozco says.