We don't know what's in the water in Rosewood, but the Pretty Little Liars girls seem to have the exercise itch right now.


First Ashley Benson (Hanna) showed off her crazy boxing workout and now Troian Bellisario (Spencer) is giving us an inside glimpse into her suspension exercises.


She tweeted
yesterday (April 23), "Left: what I look like for about 5 seconds during my aerial lesson. Right: what I look like for the other 3,595 seconds of my aerial lesson. Thanks @themarkwildman."


According to our extensive research (aka our calculators), that means Troian is doing intense aerial workouts for an hour long. You go, girl!


What do you think is more strenuous? Troian's classes, or Ashley's boxing? Weigh in below!


Pretty Little Liars
Season 4 premieres on Tuesday, June 11, 2013 at 8 p.m. ET/PT on ABC Family.

Credit: Troian Bellisario's Instagram Photo: Troian Bellisario's Workout