Run (Downtown Brussels) 50:08 [3] 4.96 mi (10:06 / mi)
shoes: Altra Lone Peak 3.0
Run 2: On the TM, run for 50:00 at normal easy pace, but each 5:00, crank the incline up to 4% and run the same pace but uphill for 1:00. Then lower it back down and continue till the next hill starts. This shouldn't be too strenuous of a workout; if it is slow down the pace a bit.
OR for an outdoor version of this workout, run a rolling course for 50:00 mostly at an easy effort. Make it an easy hill fartlek by pushing a few of the hills.