I noticed that after a good amount of swimming, my vocal chords feel a lot more 'free', so hitting higher notes is less of a struggle. I also noticed that I'm able to achieve a more natural vibrato when singing post-swimming for the next hour or so.
What is it about the sport (or sports in general perhaps?) that cause this? I'd like to know so then I can be more self aware of when my vocal chords are relaxed versus tight.
