ROCHESTER, Minn — The fitness instructor bounces from side to side, his feet a blur, his arms lifted skyward.

“Alright,” Fred Woolman shouts into his headset as 50, mostly, seniors lift their arms in unison. “Pick 'em up, put 'em down!” he barks.

Fred is trim. His biceps bulge from beneath the sleeves of his black t-shirt. He pauses, only briefly, so his class can sing “happy birthday.”

The perpetual-motion-machine-of-a-man has just turned 84.

“He does not look 84. He doesn’t act 84, at all,” Sue Davis, a member of Fred’s fitness class, says.

Fred has the birth certificate to prove his age. A copy now lives in a file at Guinness World Records.

On Fred’s 84th birthday, Guinness adjudicator Hannah Ortman presented the octogenarian with his certificate for world’s oldest active male per

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