restricted breathing during intervals

strobinson1

Hi, been doing interval training with my girlfriend to get faster at running. When we pick up our pace however she starts to struggle to breathe. Says it feels like she can't get any breath in to her lungs. Wondering if it's just something to do with breathing technique or something else like mild asthma symptoms, or something else we've not thought of!

Thought I'd see if anyone has an advice? e.g. would a VO2 Max test help to diagnose the issue? No normal breathing problems otherwise.

SHADES

Maybe the pace is too fast for your girlfriend?    It could be asthma so doc's visit required.   

VO2 test would be pointless