by dtc » Tue Jul 21, 2015 6:32 am
Adrenaline is your body's reaction to something that is 'stressing' it. If you are not used to surfing, or not used to the wave etc, then that is how your body reacts. For example, you may feel almost bored surfing waist high waves but have adrenaline coming out your ears in double overhead - simply because one is something you are used to, the other isn't. Even if your mind is saying one thing, your body is saying 'this is different, this is strange, I might need to do something, need to be ready for it'.
Its the same in pretty much everything you do. First time you drive a car at 100km/h you are gripping the wheel very tightly and tense up; after a while you end up one arm out the window tapping along to ACDC.
However, tensing up does reduce performance - as you say, shorter breath, tense muscles, perhaps teeth grinding. You may not really be focusing or focusing really intently on only one thing. On the other hand, a bit of excitement and emotion produces the best performances.
So I would say you will calm down a bit when you get more used to surfing; but if you ever lose 'the stoke' then that is when your performance really drops off.