Notes from Day 1 of the draft combine

Steven Adams was arguably the most impressive performer at Thursday's NBA draft combine. AP Photo/John Heller

CHICAGO -- The 2013 NBA draft combine officially got underway Thursday in Chicago. A plethora of NBA general managers, scouting staffs and head coaches were in the gym to watch almost 60 of the top prospects in the draft run through five hours of drills and measurements in the morning.

In the afternoon, teams sat down one-on-one with the prospects to interview them.

On Friday, the combine continues with intense drills and live action, athletic and strength testing and more interviews in the afternoon. You can watch all of that on ESPNU from 10 a.m. to 2 p.m. ET, then on ESPN2 from 2 to 3 p.m.. On Saturday, players will get physicals conducted by the league.

I was in the gym for the five hours Thursday and in the J.W. Marriott hotel lobby where the players were staying for most of the afternoon and evening. Here's what I learned: