NFL

Hard core: James Harrison shows off his insane ab strength

Sep 28, 2014; Pittsburgh, PA, USA; Pittsburgh Steelers linebacker James Harrison (92) reacts during player introductions the Tampa Bay Buccaneers after coming out of retirement at Heinz Field. The Buccaneers won 27-24. Mandatory Credit: Charles LeClaire-USA TODAY Sports

Sep 28, 2014; Pittsburgh, PA, USA; Pittsburgh Steelers linebacker James Harrison (92) reacts during player introductions the Tampa Bay Buccaneers after coming out of retirement at Heinz Field. The Buccaneers won 27-24. Mandatory Credit: Charles LeClaire-USA TODAY Sports

Steelers veteran linebacker James Harrison is 37 years young, but his workout videos never get old.

Harrison shared a clip of himself working his core by pulling himself up and swinging his legs back and forth. And it judging from the second video, it looks like his 7-year-old son is already learning from his dad.

h/t: For The Win

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