Sylvester Stallone flashes jacked physique at 79 in rare gym video

Sylvester Stallone isn’t showing signs of slowing down.

The "Rocky" icon, 79, stunned fans over the weekend after showing off his muscular physique in a new gym video.

"I haven’t done a video from the gym in a long time," Stallone said with a laugh in the Instagram clip. "In a way, it’s kind of like a sanctuary, a church."

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"We pray to get better, to feel better physically, so you have the strength to arrive at your goals...