By A Mystery Man Writer
91-year-old becomes social media star thanks to her fitness routine - Good Morning America
London's 'fittest granny', 70, who works out for 2 hours a day after ditching men - MyLondon
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76-Year-Old Superfit Grandma Proves Age Is No Excuse for Ditching Your Workouts - EssentiallySports
Superfit 70-year-olds reveal their exercise routines
Joan MacDonald, 74: Journey to Strength and Fitness - AGEIST
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Superfit gran, 63, shares workout as she brags she couldn't do this in her 40s - Daily Star