The 70-year-old actor may be used to physical exercise having taken on the famous role of fictional boxer Rocky Balboa in the "Rocky" franchise, but after he joined his eldest daughter Sophia, 20, for a core fitness session he was left feeling exhausted.
Taking to Instagram, the "Creed" star said in a video: "For anyone who's never tried Pilates - the name sounds cute, but it ain't cute."
He then captioned the footage: "Brutal! Working out with my daughter doing Pilates... Oh my God. This is like going the distance with Clubber Lang and Drago before breakfast!! This is an amazing workout but definitely not for the faint of heart.
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