Are there any physical, mental, or health-related medical conditions that could permanently exclude someone from going into space?

Do the criteria differ from one country's (government sponsored or private) program to another?


2 Answers 2


For NASA, candidates must be able to pass the long-duration space flight physical. Height, blood pressure, and vision are three of the physical requirements included in this test. From their website:

Astronaut Requirements


  1. Distant visual acuity: 20/100 or better uncorrected, correctable to 20/20 each eye.
  2. Blood pressure: 140/90 measured in a sitting position.
  3. Height between 62 and 75 inches.

Mission Specialists

  1. Distance visual acuity: 20/200 or better uncorrected, correctable to 20/20, each eye.
  2. Blood pressure: 140/90 measured in a sitting position.
  3. Height between 58.5 and 76 inches.
  • 1
    $\begingroup$ no requirements about teeth? $\endgroup$
    – user55
    Jul 16, 2013 at 23:37
  • 3
    $\begingroup$ "correctable to 20/20 each eye" does that mean lazer eye surgery? and is one not allowed to wear glasses? $\endgroup$ Jul 16, 2013 at 23:58
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    $\begingroup$ @trapo They eat out of tubes. Therefore, teeth are not required. Teeth are highly recommended, though, in case the food runs out and Velcro is the best source of nutrition. $\endgroup$
    – user12
    Jul 17, 2013 at 17:31
  • 1
    $\begingroup$ Can g force ruin dental capsule at lift off? $\endgroup$
    – user55
    Jul 17, 2013 at 18:33
  • 1
    $\begingroup$ @Undo look at youtube.com/watch?v=e11eImxr6lI $\endgroup$
    – user55
    Jul 17, 2013 at 20:54

The Roscosmos requirements for the professional cosmonaut candidates are published here. The google translation seems to be intelligible.

It includes the list of medical areas of inspection:

  • internal organs inspection;
  • neuropsychiatric inspection;
  • surgical inspection;
  • ophthalmological inspection;
  • otorhinolaryngologic inspection;
  • dental inspection;
  • functional inspection;
  • gynecological examination (for women);
  • psychiatric inspection;

as well as the list of assays required (all kinds of blood tests, feces, urine, 12-lead ECG, etc etc etc).

And, in particular, the set of general anthropometric requirements.

Anthropometric data (the maximal allowed values):

  • height (150-190 cm);
  • height in the sitting position (80-99 cm);
  • weight (50-90 kg);
  • foot length (29.5 cm);
  • shoulders (52 cm);
  • distance between the armpits (45 cm);
  • hip width in the sitting position (41 cm).
  • $\begingroup$ The links are broken. Good thing you included a lot of useful information in the post. I'm not sure where to find the links, or else I'd propose an edit. $\endgroup$
    – mgarey
    Apr 17, 2019 at 17:47
  • $\begingroup$ I wonder if any short-torsoed person has ever met the height requirement but not the sitting height requirement. $\endgroup$
    – ben
    Apr 17, 2019 at 22:35
  • $\begingroup$ @mgarey Indeed. The original page is gone, as of April 2019 the current medical requirements deocument is here: gctc.ru/media/files/Otbor_kosmonavtov/… . And the complete set of requirements seems to be collected on this page: gctc.ru/main.php?id=3736 $\endgroup$
    – user54
    Apr 18, 2019 at 19:05
  • $\begingroup$ I have updated the links. $\endgroup$
    – user54
    Apr 18, 2019 at 19:07

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