C02 inhalation when doing HIIT?

[So]

Odd thing happened today.

I was doing watt bike sprints, which I do every week and which are always hard but OK. Today, however, I felt like I was about to have a heart attack. I couldn't breathe.

Next to me was a Nottingham Rugby prop also doing sprints. I would say he was about 2-3 feet from me, I'd also put him at 18 stone.

I found that when I turned my head away from him between sprints I felt a lot better.

Was I breathing his exhaled C02 and was that why I was struggling? Odd question I know, but it's the only explanation I can find.

[numtumfutunch]

Im not an expert but my limited knowledge suggests "no way Jose"

[mybrainhurts]

Was he farting a lot?

[oddman]

Inspired CO2 0.04%
Expired CO2 4%

I'd be very surprised if his diffused CO2 could change the atmosphere in the room

If I was doing a hard session next to a massive professional athlete I suspect my heart rate would be up 5-10 ppm through intimidation - this would have the effect of bringing threshold intensity down making a usually tolerated interval hard

[So]

oddman said:

Inspired CO2 0.04%
Expired CO2 4%

I'd be very surprised if his diffused CO2 could change the atmosphere in the room

If I was doing a hard session next to a massive professional athlete I suspect my heart rate would be up 5-10 ppm through intimidation - this would have the effect of bringing threshold intensity down making a usually tolerated interval hard

You're probably right. It was odd though.

[mybrainhurts]

Don't worry, it's probably just the early onset of death....

[Phooey]

...or he caught you staring at his c o c k

[AlexC1981]

You felt like you were about to have a heart attack, yet you pushed through it and carried on?

I'm sitting here with one eyebrow raised.

[So]

AlexC1981 said:

You felt like you were about to have a heart attack, yet you pushed through it and carried on?

I'm sitting here with one eyebrow raised.

To be absolutely accurate, I've not had a heart attack yet so I couldn't be sure that the sensation was that of an imminent cardiac arrest. However, I felt quite distressed and as though I couldn't get enough oxygen into my lungs.

[mybrainhurts]

So said:

AlexC1981 said:

You felt like you were about to have a heart attack, yet you pushed through it and carried on?

I'm sitting here with one eyebrow raised.

To be absolutely accurate, I've not had a heart attack yet so I couldn't be sure that the sensation was that of an imminent cardiac arrest. However, I felt quite distressed and as though I couldn't get enough oxygen into my lungs.

And what makes you think you didn't have a heart attack...?

Two eyebrows raised...