How celeb trainer Grant Roberts whipped Kumail Nanjiani into superhero shape

Jaws dropped when actor Kumail Nanjiani revealed his newly-chiseled physique to the world last week, with many wondering how the future superhero beefed up, seemingly overnight. Beyond protein shakes and weights, Nanjiani's trainer Grant Roberts -- who’s previously worked with stars like Eva Longoria, Zachary Levi and Hilary Swank -- formulated a custom process that...