Tired and Running ???

I went out for a run on Fri and even before I started I felt tired and wondered If I should continue  after a while you think should I stop and walk and then run again  many runners my self included think that if I stop  or slow down is  a failure and admitting defeat , but then running when I'm tired also causes me to run  slouched and in a poor running form, and maybe to much tension . I could stop refocus  walk and start over again  time shouldn't matter  it is a training run and  I do them to  help me solve my running problems and technique  And a quot from a friend is that just because you have your running gear on doesn't mean you leave your brain at home.  So I ended up slowing down a bit figuring that  with the hike and then my run on Thursday I hadn't given myself enough time to recover. So I concentrated on landing on my fore foot then ball of my foot  pushing of and noticed that the slower my movement the more I would land on my heel, the faster I went. I would land on the front of my feet and I would lift my thighs higher so that my legs would be freer to move forward. I finished my loop doing part of the Canada trail to tanzor cut off then heading to Gibbons rd and back to Duncan  Its a quite loop not much traffic on the road and in a rural area  the route  has enough hills and straight stretches to make you have an good work out.