Sticking to its grassroots campaign, Under Armour recently held a Grind Session down in Washington, DC, featuring some of the DMV’s best high school ballers, including Aquille Carr. During the session, players were put through a rigorous set of drills headed by Under Armour trainer Jay Hernandez. Aimed to test players both physically and mentally, each player surely walked away having learned a new trick to improve their game and new drills to work on during the offseason. Check the video above for highlights from the day.

(H/T: BallisLife)