Losing erection when out of breath

I’m sure there’s a few things that go into it (stress/anxiety, poor sleep, occasionally alcohol), but when I lose my erection it happens at the same time every time.

I can always get hard, and we’ll usually start off in missionary, but after a few minutes when I start to get out of breath and need to change position , this is when I’ll go soft.

It now feels like I need to cum in the first position of sex or I’ll lose it.

Has anyone else experienced the same/have any advice?

I’m fairly fit, but plan to up the Cardio to at least make that point further away so I’m more likely to finish before my lungs do

Same

I have the same issue sometimes. Mine feels linked to heart rate. The higher my heart rate the harder it is to keep it. I suspect it may be because I breathe too shallow and hyperventilate which triggers my fight or flight response. Increased heart rate and hyperventilating are 2 sure signs that my anxiety is acting up so it makes sense for my brain to register them as stressful.