I’d probably start with the breathing exercises for what you’re saying, just because those are so easy to change in a short time.

I wouldn’t be surprised if you’re right on the nose with not breathing fully, and that coinciding with your pace is at least part of the trouble.

When I used to run in high school I couldn’t figure out why it was so difficult because I ran every day, and I could jog for a very long time without stopping. But I felt like I was always pushing myself and I felt like it should have been easier considering how often I jogged.

Long story short, I started looking at my pace, which was way too fast to be able to breathe comfortably through my nose, with a lot of top runners do, died usually be heaving breath in and out through my mouth because I was just pushing my body too hard for no reason. And I never improved. I just sort of plateaued at what my body could handle because I was just taking it to 100% as soon as I started running.

So I just jogged a slow as I could jog comfortably breathing through my nose, and I actively practiced slowing down my breaths, and it worked for me. And then when I was 25 I read this great book by Christopher McDougall called’born to run", this expose on a running tribe in South America who’s famous because they’re 90-year-olds can run marathons without a problem and he was like 36 and his knees were already breaking.

And a lot of the stuff he found out when he went down there and met with the tribe and learned how to run from them. Has to do with running comfortably and if you run comfortably then you’ll get faster naturally instead of trying to run it a speed you think you’re supposed to and then pushing your body so that it can’t improve because it’s focusing on not falling apart.

The book’s an amazing piece of journalism even without the running, but I would recommend it specifically for the chapters on when he talks about the mechanics and breathing exercises that this tarahumara tribe teaches him.

After I realized that running was not supposed to be difficult is when I really began to enjoy running.

Anyhow, I’d be really interested to hear how your experiments with breathing exercises, pace and running form affects your chest pain, I’d be shocked if you weren’t able to ameliorate those symptoms to some degree.

I’ll say that running at a pace I could comfortably maintain while only breathing through my nose was the biggest change for me. I think maybe the first two times I ran I was noticeably slower I was like. Oh my gosh I’m going so slow, But by like the third day it might even have been the end of the second run breathing differently, I was already feeling like I could keep up my new pace, that did gradually get faster as the week went on, as long as I wanted to, and eventually just did marathons that I set up on map my run because I just kept running farther and farther.

Let me know how it goes. I’m glad to discuss this stuff, I’m literally just walking around the neighborhood typing this before my evening run haha.

Shoot sorry I just thought of something else. The other major piece of information that stuck with me from when the Mexican tribe was teaching this guy how to run was that they never leaned very far forward when running, They preferred to bounce up and down on the balls of their feet while moving forward. Just pushing slightly forward with each bound but they were using their ligaments more like rubber bands instead of reservoirs of energy that they used up. Like instead of using a finite amount of energy that cost way more energy and used more oxygen, they were more bouncing using the biomechanical advantages their ligaments afforded them.

That made me more conscious of how much energy I was using on each step when I was pushing off and how much air I need to take in to maintain the level of oxygen I was using up.