Today we feature the story of another of our BHF Heart Runners, Jill Butterworth, who's among the more than 600 runners taking part for us in the 2008 Flora London Marathon this Sunday.
Jill says: "The British Heart Foundation is very close to my heart. My daughter Mia (pictured!) was born with complex congenital heart defects.
"She has had several cardiac catheterisations and three heart surgeries so far. All that was before she was four years old. Mia will need more surgery in the future.
"I'm running to say thank you to the BHF for all the work they do, including funding the invaluable Cardiac Nurses, undertaking life saving research, providing vital information and caring for and supporting heart patients.
"So please support me and donate online!"
You can sponsor Jill for the Marathon online here