Girls' Generation's Seohyun and Hyoyeon tweeted about the joys of working out!

"With the breezy and good weather, we worked out on the athletic field," Seohyun postedearlier today. "It reminds me of my past school years. Everyone have a good day."

As best friends, Hyoyeon seems to have decided to join Seohyun during her workout. The two of them strike a pose for the camera, leaving fans in awe at their casual beauty even dressed in athletic gear!