Stig Åvall Severinsen
Four-time world freediving champion and holder of multiple Guinness World Records.
Stig Åvall Severinsen is a Danish freediver. He is a four-time world freediving champion and holder of multiple Guinness World Records. He wrote
Træk Vejret – mere energi, mindre stress
(2009), published in English in 2010 as
Breatheology – The Art of Conscious Breathing
. Severinsen has a degree in biology and a Ph.D. in medicine.