Not a day for rounded back syndrome. Be careful what you wish for on that bar. You may get more runs/reps in than you think so choose a weight that won't smoke your back. Our Tuesday link to K. Star's MWOD site is equally applicable to this lift.
Complete as many rounds as you can in 20 minutes of:
Run 400 meters
21 Deadlifts 155#/110#
See you there!