LONDON (Reuters) - American weightlifter Holley Mangold tips the scales at 346 pounds (157 kilograms) and she is proud of being the heaviest woman at the London Olympics. Mangold, 22, who competed in the women's 75 kilogram-plus division, is one of growing number of women athletes speaking out at their frustration with the public scrutiny of their body size and image rather than their fitness and skills. At the 2012 Olympics, a list of top female athletes have hit back at critics who have called them fat including British heptathlon champion Jessica Ennis, Australian swimmer Liesel Jones, and the Brazilian women's soccer team. For Mangold, her weight is a something to be proud of. "Between my team mate (Sarah Robles) and I, I think we both showed you can be athletic at any size," said Mangold whose Twitter profile has the tagline "Loving life and living big!" "I'm not saying everyone is an athlete but I am saying an athlete can come in any size."