Originally Posted by dealt_with
If you're sprinting 200 metres then jogging 100 metres then subsequent 200 metre 'sprints' are not going to be sprints, more like runs. You're basically just doing aerobic training after a few 200 metres so it's not really sprint training at all.
If you're running to get fit then you need to decide what energy system you want to target.
Ok I see. Its not called sprint training then. You are right. When I say sprint, I run at ~ 80% speed using long steps. What I do helps me, so tried to help the OP with the same. That's pretty much it.