BOUNTIFUL — A 17-year-old boy was in critical condition Wednesday after he collapsed during a body conditioning class at Viewmont High School.

Officials said the boy was working out in the weight room after school, doing arm curls with relatively light weights, about 25 pounds, when the problem started.

"He felt, as he describes it, something pop in the back of his head, in the back of the head and the neck area," said South Davis Fire Chief Jeff Bassett.

The boy walked over to his coaches and told him what he felt, and that he had a headache, Bassett said. But as the trainers were checking him out, the teen had a seizure.

When medics arrived, the boy was conscious and talking to them.

"He talked to us for a minute or two, but then he stopped," Bassett said. "He just really deteriorated in his ability to respond to questions. Whatever happened, it occurred quite quickly."

One of the coaches said he thought the student had suffered a stroke because he was having problems with the left side of his body.

Classmate Justin Cederlof said the teen often lifts weights.

"He was really dedicated to body conditioning," he said.

The boy was flown to Intermountain Medical Center in critical condition. His name was not released.

Contributing: Jared Page

Sandra Yi