Looking for perspectives. I've read so much about going slower to go faster. I've also read so much that you can't get faster without going faster. Now, my #1 goal is not to be the fastest, but I also like to challenge myself and feel myself getting stronger. After swearing that I would never run a half marathon, I did it in October. Now I want to start improving my PR. Finally finding my Zone 2 range allowed me to go farther than I've ever been able to go, but my pace drastically reduced. Now I find that I have to force myself to run faster, but I just can't go very far without gasping for breath. So, how do I find the sweet spot?