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

'Sometimes I ask myself 'why am I doing this?' but the negative comments are outweighed by the people who tell me I inspire them - and that's what keeps me going.

'I'm not the average 70-year-old - and I have no intention of giving up now!'

Retired Mary dabbled at the gym in younger years, but didn't begin taking it seriously until she hit 59, when her mother died.