Breaking records during a workout?

I certainly wish I could break some records but then again I am not an elite athlete.

This is just amazing stuff:

Dathan Ritzenhein exceeded the U.S. record for 10 miles on Monday in a workout.

The U.S. record holder in the 5,000 meters is gearing up for the World Half-Marathon Championships in Birmingham, England on Oct. 11.

Ritzenhein covered the 10 miles in 45 minutes, 3 seconds -- running 4:30.3 per mile. He did half the workout on the track and half of it on the road. Alberto Salazar administered the workout.

How good is that?

Consider that Deriba Merga's world record for 15K was recently ratified at 41:29. That was en route to a half-marathon. Ritzenhein ran 41:45 for his final 15K on Monday's 10-miler.

I would be willing to bet that something very special is going to happen at the World Half-Marathon Championships. Let's just hope the weather is good for running.