Sara Cox has admitted that she is unable to "walk" after taking on her tough Children In Need marathon challenge . The broadcaster has opened up on how she is coping just days after running five marathons in five days. She managed to raise a huge £10,169,084 for the charity by taking on the feat. The star has now said how difficult she found the 135-mile challenge, but that raising the money means "the absolute world ". Sara said she expected to get home and be able to take the dogs for a walk,