Tightness in my chest during training sessions

[daforg]

I've noticed that as a training session progresses I find it hard to do a full breath-up, specifically filling my chest. After my last DYN session this week I did some chest stretches when I got home and I seemed to experience some relief, it's also fine after a couple of hours. So I'm wondering whether this is just a bit of fatigue/tightness developing in the chest during the session? I don't currently have freedive specific stretches in my routine, just general stretching after my gym workouts and some occasional yoga asanas.

Has anyone experienced this and if so, am I identifying it correctly?

Thanks!

 

[Nathan Vinski]

I used to experience this as well. Similar to how your forearms get pumped after rock climbing the chest can feel the similar from holding in a big breath of air all the time. It went away with practice, but intercostal stretching before and after the season can speed the process up. I still get a tired upper back the day after a pool session but not depth, which makes me inclined to say it's from holding in the big air volume