#170 David "Jacko" Jackson - Breathe Smarter. 100 Ultra Marathons in 100 Days. World Record Holder

World Record Holder completing 100 Ultra Marathons in 100 Days. Former professional rugby player, David ”Jacko” Jackson shares how breathing mechanics can support nervous-system regulation, athletic performance, and recovery. He describes overcoming a traumatic brain injury and recounts completing 100 consecutive ultramarathons in 100 days to raise awareness and funds for brain-injury charities, and shares practical foundations for more controlled breathing. He is a master instructor with Oxygen Advantage and hosts training events often. Check out his new book “Breathe Smarter Run Faster”.

Chapters

00:00 From rugby and traumatic brain injury to breathing research

05:16 100 consecutive ultramarathons for brain-injury charities

08:34 Breathing rate, perceived effort, and nervous-system control

12:25 Tongue position, airway mechanics, and training the tongue

15:17 Why nasal breathing supports calmer everyday breathing

18:12 Tongue up, breathe back: finding diaphragmatic expansion

20:49 Rib-cage position and practical diaphragm-awareness tests

28:24 Breathing under load when nasal breathing is not possible

32:12 Why VO2 max alone does not measure performance

34:30 CO2 dumping versus building tolerance