Can less be more?

The E=MC2 of running

I set myself a goal to run every day this year, and so far, I have achieved that goal. I also set myself a goal to run at least 30km each week, and again, I have managed to achieve that. However, what I haven't done is much speed work and so I wasn't sure how I would get on running 5km at parkrun. Would I be able to maintain a good pace? Would I die after running the first km too fast? I felt fairly confident that I could run around 4.45 per km but could I run quicker than I had done in training without having done any speed specific training? Would my lack of focused 5km training be my downfall? Find out in this week's episode.