Liz Yelling and the GirlzRun team of experts will be joining us on Mumsnet to answer your questions on all aspects of running. This can include anything from how to get started, nutrition, injuries, running while pregnant or breastfeeding or getting back into running after a baby and juggling parenting and running. Liz is also happy to answer personal questions about how she manages to combine being a mother with being an olympic athlete. She's aiming for her 3rd Olympic Games in London 2012.