Todays 7 mile tempo run

My easy run on Monday wasn't really easy at all. Saturdays long run felt so good I ran 9:45 miles instead if a comfortable 10:20-10:30 pace. Todays first 3 miles felt pretty good at a 8:50 pace, then the next two were a struggle. The final 1.5-2 miles turned into 100 meters sprints and a lot of walking. Wish I could do Mondays run over again.