The 71-year-old grandmother’s weightlifter caused a stir on social media

Mary Duffy, 71, from Trumbull, Connecticut started working out at the age of 59 after piling on weight following the death of her mother in 2007, losing more than 50lbs within one year.

She quickly became hooked on weight lifting and now spends around 20 hours a week pumping iron in six hour gym sessions, and has more than 30 state and world records to her name.