Sydney Sweeney reveals she gained 30 pounds for her role as boxer Christy Martin by eating fast food and training intensely.

Sydney Sweeney provided a closer look at the fast food diet she adopted while trying to gain 30 pounds to portray boxer ...

For decades, we've been told that weight loss is a matter of willpower: eat less, move more. But modern science has proven ...

Sydney Sweeney provided a closer look at the fast food diet she adopted while trying to gain 30 pounds to portray boxer ...

Sydney Sweeney underwent a grueling transformation for the boxing biopic "Christy," gaining 30 pounds through intense ...