"A marathoner’s worst nightmare — hitting 'the wall' — may be completely avoidable if athletes adhere to personalized pace limits proposed by a biomedical engineer and runner (Benjamin Rapoport)." "This is a unique area that hadn’t been addressed in the medical literature in any substantial way,” says Mark Cucuzzella, a physician and running coach based in Harpers Ferry, W.Va. "He’s lending some hard numbers to what experienced runners and coaches have been doing.” Rapoport’s model also shows that a slightly faster pace can be maintained by consuming a midrace snack. He plans to put an easy-to-use version of his formula on the Internet."