If you are running to the same place and back?
It is known that running at slower speeds is more productive in terms of body weight loss and maintenance than faster running. Slow running is good at developing the blood supply capillary system which will get fresh blood to your muscles more efficiently when you do run fast. I think it really depends on the distance your running to.
What I did in the when I was in the Army was we would go on a 3 to 10 mile run, and after you have been running for a while your body gets in a rhythm. We would start doing 100 meter wind sprints every half mile to mile. This would break it up and bring our heart rate backup.
I would say slower because you still are getting the effective movements of the body and when you run more moderately you don't get tired as fast which would increase your running time, which would make for a better workout.
Well I don't run anymore, busted my knee up shattered my femur, and broke my hip in a few places. Now I have to do the bike or the elliptical.
Wow that's amazing. I don't run that far hahaha, I only run 2 ish miles a night. Maybe a bit less. I'm trying to build it up to 5 though.
Also if you push past the pain in your chest, it will go away and you will feel like you can run forever.