New research indicates that astronauts can grow approximately 7cm taller in space.
As space travel transitions from science fiction to reality, the world has recently witnessed a significant breakthrough in the realm of space tourism with the successful flights of billionaire Richard Branson and Jeff Bezos. With more opportunities arising for humans to embark on space flights, there is growing interest in the effects of entering a microgravity environment on human health.
Astronauts aboard the International Space Station (ISS).
Scientists have long noted that astronauts experience a slight increase in height during extended months spent aboard the International Space Station (ISS). NASA has utilized ultrasound technology to precisely observe what happens to astronauts’ spines while living in a microgravity environment. Space travelers can grow up to 3% taller.
Recently, a study conducted by a group of scientists calculated the potential height increase when living in a microgravity environment and warned about certain related health issues.
A study led by Professor Steven Cohen revealed that astronauts traveling in space could increase their height by approximately 7cm, but this increase also puts them at risk for chronic back pain upon their return.
The weightless environment promotes height growth by straightening the spine. Without the influence of Earth’s gravitational pull, the spine can expand and relax, allowing astronauts to genuinely grow taller.
However, upon returning, Earth’s gravity will act upon them, reversing this effect and leading to a risk of back pain. Scientists believe that the benefits of increased height do not last long, as height may return to normal after some time back on Earth.
Previous studies have indicated that about 52% of astronauts also experience back pain during the first two to five days of their space journey. They report that the pain typically subsides afterward, but some conditions may develop further, such as sciatica, a type of pain that starts in the back and radiates down the legs.
Research published in the prestigious journal Anaesthesiology has revealed that the vibrations from rocket journeys can also cause discomfort, albeit not significantly.
These pains may lessen and gradually disappear with regular exercise in the gym aboard the International Space Station. This is why exercise equipment is installed on the ISS.
