Jennifer Aniston, who is 51 years old, is in great shape and her trainer Leyon Azubuike deserves some credit for it. According to Azubuike, the actress enjoys working out with intensity and gives it her all at the gym. Us Weekly features an interview with Azubuike where he talks about Aniston’s fitness routine. The article also mentions how Aniston has always had an impressive physique throughout the years.