Exercise icon Richard Simmons, known for his groundbreaking work in the health and wellness industry, spent his birthday immersed in the development of a new Broadway musical. Simmons was hard at work on developing the Broadway musical on his 76th birthday on Friday, July 12. Richard’s representative, Tom Estey, told outlets that the health and fitness icon had “aligned with Patrick Leonard — who has worked with the likes of Michael Jackson, Madonna, Elton John, Leonard Cohen, Jon Bon Jovi and many more — to compose the music.” The theater production was going to take place in an open space ne…