There's an interesting article about Freediving on the Magic Seaweed [surfing] site:
http://magicseaweed.com/news/the-ma...o-your-heart-when-you-dive-into-the-sea/6771/
just in case its of interest to anyone
http://magicseaweed.com/news/the-ma...o-your-heart-when-you-dive-into-the-sea/6771/
just in case its of interest to anyone