Gary Null has a Ph.D. in nutrition and public-health science and hosts the nationally syndicated "The Gary Null Show." He has set numerous indoor and outdoor track records and is a top-ranked athlete, winning an average of fifteen to twenty races each year in his age group. He lives in New York City. Howard Robins is a doctor of podiatry who serves as Director of Sports Medicine for the Natural Living, Walking, and Running Club. He lives and practices in New York.