Behaviors That Alter Your Genes to Improve Your Health & Performance | Dr. Melissa Ilardo

Bajau Adaptations

The Bajau sea nomads exhibit remarkable genetic adaptations that enhance their free diving abilities. Melissa Ilardo explains that Bajau individuals have significantly larger spleens, which act like biological scuba tanks, increasing oxygen availability during dives 1. This adaptation is believed to be genetic, as both divers and non-divers in the population share this trait. Additionally, the Bajau's ability to hold their breath for extended periods, sometimes up to 13 minutes, showcases their exceptional diving skills 2. Ilardo highlights the role of evolutionary mutations, noting that beneficial genetic variations can rapidly become advantageous in specific environments, such as breath-hold diving 3.

We discovered that they have larger spleens. I mentioned the spleen's role in diving. It's increasing. Sometimes people call it a biological scuba tank.

--- Melissa Ilardo

These adaptations illustrate the fascinating interplay between genetics and environment in shaping human capabilities.

   

Haenyeo Resilience

The Korean Haenyeo women divers demonstrate unique adaptations that support their resilience in cold water diving. Melissa Ilardo describes how these women, often diving well into their 70s and 80s, have developed cardiovascular changes that enable them to thrive in harsh conditions 4. Despite the challenges, including diving without wetsuits until the 1980s, the Haenyeo have maintained their cultural heritage and continue to dive for various marine resources 5. Their willingness to dive in extreme conditions, even during pregnancy, highlights their extraordinary commitment to their way of life 6.

The average age of the Haenyeo currently is around 70 years old. So that's when I think of robustness with age, I think of the haenyeo.

--- Melissa Ilardo

These adaptations underscore the Haenyeo's remarkable endurance and the cultural significance of their diving practices.