Five rugby stars who bulked up and suddenly got hench

And that means more work in the gym, sculpting their perfect bodies and lifting heavy weights to gain extra muscle.

But these stars didn't always look like body builders.

In fact, these rugby stars have enjoyed a remarkable body transformation over the years, and definitely didn't skip leg day.

The Wallabies legend started out as an skinny 78kg teen who worked day in and day out to transform himself, with his size and strength came at a cost, Pocock told Australian Story.