With the NBA Draft rapidly approaching, Myles Turner, who spent one season at the University of Texas before declaring for the draft, has completely reworked how he moves on the basketball court. Scouts noticed that Turner, who measures just under 7 feet tall, often struggled to run up and down the court. It was at a point where outsiders thought he might have a knee problem.

But as Turner prepared for the NBA Combine at Impact Basketball, founder Joe Abunassar diagnosed a simple issue of running mechanics, a result of Turner’s gluteus medius not firing correctly. The team at Impact worked with Turner both on and off the court to make him more explosive and agile than he’d ever been. The work paid off.

“He’s maybe the most skilled big man I’ve seen in 20 years,” Abunassar said.

Check out the video above for a full look at the training Turner went through to fix his running problem and prepare for one of the biggest days of his life.