---
title: "Long-Duration Spaceflights Create New Hidden Health Risks for Astronauts"
description: "A study showed that astronauts after spaceflights lasting over 90 days face an increased risk of hip fractures at a younger age due to bone strength loss."
date: 2026-10-03T09:59:22.000Z
lang: en
url: https://xab.info/en/posts/long-duration-spaceflights-health-risks
tags: [space-flight, astronauts, health-risks, nasa, bone-density]
publisher: "XAB.info"
---

# Long-Duration Spaceflights Create New Hidden Health Risks for Astronauts

![Astronaut in a spacesuit aboard an orbital station](https://xab.info/media/2026/10/03/dlitelnye-kosmicheskie-polety-riski-zdorovya/dlitelnye-kosmicheskie-polety-riski-zdorovya-1.webp)

## 🎯 Key Points

- Spaceflights lasting over 90 days increase the risk of hip fractures.
- Bone tissue loss leads to injuries at a younger age.
- NASA is strengthening control over astronaut bone recovery using CT scans.

Humanity's drive for deep space exploration faces significant new medical challenges. According to a major scientific study published in the prestigious medical journal Mayo Clinic Proceedings, astronauts who spend more than 90 days in orbit under microgravity conditions face a significantly increased risk of hip fractures after returning to Earth.  This groundbreaking discovery forces space agencies worldwide to review rehabilitation protocols and medical monitoring procedures for crew members completing long-duration missions.

### Research Methodology and Space Traumatology Specifics

Because the total number of people who have ever flown into space is relatively small for traditional medical statistics, scientists had to employ unconventional analysis methods. Researchers used Bayesian probabilistic modeling to evaluate decades of accumulated data. The results showed that while the overall injury rate among astronauts does not increase proportionally to time spent in space, the incidence of hip fractures among mission participants lasting more than three months is markedly higher compared to both short-duration astronauts and ordinary people on Earth.

### Hidden Threat and Premature Bone Aging

Of particular concern to the medical community is the fact that such fractures in space returnees occurred at a significantly younger age than the general population average.  According to expert specialists, this is direct evidence that bone mass loss during a prolonged spaceflight leads to long-term irreversible or extremely slowly reversible negative consequences. The main trap lies in the visual deceptiveness of the process: a person may not notice bone loss in time, feel energetic, and return to heavy physical training while skeletal strength is still critically far from normal.

### New Monitoring Standards and Space Medicine Prospects

In response to these identified threats, space agencies including NASA are tightening requirements for post-flight examinations. In addition to standard X-ray absorptiometry for assessing bone mineral density, quantitative computed tomography is being actively implemented. This advanced method allows for a detailed visualization of the microstructure of individual bone segments before and after flight, tracking their recovery dynamics and protecting astronauts from premature severe injuries.

## 🔍 Fact-Check Verification

- [Длительные космические полеты создают новые риски для здоровья – Zamin.uz, 03.10.2026](https://zamin.uz/ru/tekhnologii/223407-dlitelnye-kosmicheskie-polety-sozdayut-novye-riski-dlya-zdorovya.html) - Основной факт о публикации в Mayo Clinic Proceedings подтвержден.
- [Марс подождет? У длительных космических полетов обнаружили еще один риск для здоровья человека](https://www.ixbt.com/news/2026/10/02/439791-mars-podozdet-u-dlitelnyx-kosmiceskix-poletov-obnaruzili-eshhe-odin-risk-dlia-zdorovia-celoveka.html) - Детали о переломах шейки бедра у астронавтов после 90 дней полета.
- [В NASA выявили связь между долгим полетом в космос и переломом бедра](https://rtvi.com/news/astronavty/) - Упоминание мер NASA по контролю плотности костей.
- [Полеты в космос длительностью более 90 дней повышают частоту переломов бедра у астронавтов ...](https://www.ixbt.com/live/science/polety-v-kosmos-dlitelnostyu-bolee-90-dney-povyshayut-chastotu-perelomov-bedra-u-astronavtov-novoe-issledovanie.html) - Детали о переломах шейки бедра у астронавтов после 90 дней полета.

## ❓ FAQ

### Q: What flight duration is considered critical for bones?
**A:** According to the study, an increased risk of fractures is recorded after missions lasting more than 90 days.

### Q: Why are astronauts at risk of fractures after returning?
**A:** Due to bone mass loss in microgravity and premature resumption of heavy physical loads when skeletal strength has not yet recovered.