How Long Can You Live Underwater?

TL;DR

Living underwater for extended periods can have physical effects such as changes in blood pressure and weight loss, but overall, the psychological effects are manageable.

Transcript

On June 9, 2023, biomedical engineer Joseph Dituri slowly emerged from the ocean off Key Largo, Florida, after living underwater for a record-breaking 100 days. He ate, slept, pee-ed, and even taught university classes 6.7 meters below the waves in a 9.3 square meter living space. And intrepid ocean dwellers, or aquanauts, have been having a go at ... Read More

Key Insights

• 👾 Underwater living provides valuable insights into the effects of living in confined spaces similar to spacecraft.
• 😘 Aquanauts experience lower blood pressure, heart rate, and breathing rate due to the high-pressure air they breathe underwater.
• 🌸 Weight loss during underwater missions may be influenced by the body's metabolic response to the thicker air and increased heat loss.
• ❓ Psychological effects are manageable, with aquanauts staying positive and maintaining social connections.
• 😑 Longer underwater missions have been conducted, with aquanauts expressing a desire for more time underwater.
• 🥺 The air composition underwater, including higher nitrogen levels, can lead to nitrogen narcosis, but it hasn't been reported in most underwater missions.
• 🎚️ Recent underwater records, such as a 100-day stay underwater, have shown positive physical improvements, such as cholesterol levels, sleep quality, and inflammation levels.

Questions & Answers

Q: How does living underwater help scientists prepare for space travel?

Living in cramped quarters underwater is similar to the living conditions of astronauts in space, providing insights into how humans may fare on long space missions.

Q: Do aquanauts experience any psychological effects living underwater?

Aquanauts generally maintain positive moods throughout their underwater missions, partly due to the ability to stay connected with loved ones and access entertainment.

Q: Are there any physical side effects of living in underwater habitats?

Aquanauts may experience weight loss, potentially due to the thicker air aiding in heat loss and increasing metabolism. Other side effects include changes in voice and increased vulnerability to ear infections and skin rashes.

Q: Can humans stay underwater for extended periods, such as a year or longer?

While the human body can adapt to living in denser air for short periods, the long-term effects are currently uncertain and may pose risks to the circulatory system.

Summary & Key Takeaways

• Living underwater allows scientists to study the effects on the human body and prepare for space travel.

• Aquanauts living in underwater habitats experience lower blood pressure, heart rate, and breathing rate.

• The air pressure and thicker air underwater may affect hormones and metabolism, leading to weight loss.