I had some blood tests yesterday, as I'm knocking 40 (routine apparently!) they didn't take out all that much, a few medium sized tubes.
I jumped on my trainer today to do some exercise after work (I live in nz, so winter, dark, cold and wet) and I was doing intervals, 5 mins, 10 mins off 5 mins on etc. I started breathing a bit irregular on the first interval. On the second interval felt like I was having an astma attack so I stopped and did the sensible thing and opened a bottle of wine instead.
Does taking out a little bit of blood make that much difference? I know adding it is all the rage with the sky team, but how much do you have to take out before you are weak as a kitten?