I've just got back to running after having a baby and I'm training towards a 10K. I'm doing at least 3 runs a week usually two 5ishk and a longer 9/10K. Different routes but all quite hilly as I live in a hilly area. The problem I'm having is I just can't seem to get my speed up. My park run time is pretty much the same every time. I really want to get a good time for my 10K. What's the best way to increase my speed. For reference my current park run time is 33mins. And I also do some weight exercises twice a week.