Shadowhunters actor Harry Shum Jr. has posed for a new series by photographer Tyler Shields, and talked about his fitness inspiration in shots uploaded to Instagram.

Said the 34-year-old: "I got sick of people calling me scrawny when I was growing up so I found some heavy objects and learned how to lift them. I'm glad that happened because from then on, I became healthier and stronger both body and mind. Constantly striving to be the best version of myself, damn it. Thanks @thetylershields for capturing this moment. One of the best in the biz. #WorkOutToEat #DontChangeForOtherPeople #ChangeForYourself"

Shum Jr. and Shields go way back — he first posed for the photographer back in 2010, when he was getting his start as an actor on Glee.

Shields is known for photographing Hollywood's freshest young talent. He most recently made headlines after photographing Colton Haynes and his Arrow co-star Emily Bett in a gender swap fantasy.

Check out more from his shoot with Shum Jr. below:

In December, we talked to Harry and his Shadowhunters co-star Matthew Daddario about representing the show's gay romance. Check it out below: