Summary:

- This article discusses research being conducted on the International Space Station (ISS) to study the effects of microgravity on the human body, specifically related to muscle and vein health.
- Researchers are using a non-invasive technique called near-infrared spectroscopy to measure changes in the veins and muscles of astronauts during their time on the ISS, which can provide insights into how the body adapts to the space environment.
- The findings from this research will help inform strategies and countermeasures to maintain the health and well-being of astronauts during long-duration spaceflight missions, which is crucial for the success of future space exploration efforts.