The crew of Apollo 17 with "
Mission duration 12 days, 13 hours, 51 minutes, 59 seconds" had to suffer weightlessness almost during two weeks.
(A period with lunar gravity of less than 17% instead of 100% of terrestrial gravity for two of the three astronauts is rather negligible in this context.)
Weightlessness and its effects on the human organism:
This condition, known as space motion sickness or space adaption syndrome, can last for several days in susceptible individuals.
Many of these symptoms will have almost completely disappeared by the end of the first week, as the whole body adapts to the new conditions in space. Unfortunately, this process of adaptation also means that the body starts to break down everything it doesn’t need in a weightless environment, including our tough, heavy bones, which all of a sudden have no weight to carry.
As a result of all these physiological changes, it always takes a while for astronauts to readapt their bodies and their senses to the pull of gravity after their return to Earth. Many returning astronauts find it hard to keep their balance at first.
At least when watching
Apollo 17 (Full Trip) from
1:04:40 to 1:07:35 or
from 1:09:30 to end, we have to conclude that re-adaptation from
space adaption syndrome was no problem for Apollo 17. "
Cernan, Evans and Schmitt were then retrieved by a recovery helicopter and were safely aboard the recovery ship 52 minutes after landing." (
Wikipedia)
Duration of Apollo 17 is comparable to the final mission of the American Space Shuttle program
STS-135 with 12 days and 18 hours. According to
STS-135 Landing NASA-TV Coverage the crew left the shuttle for the crew transport vehicle between 31 and 45 minutes (
3:09:30 – 3:13:15) after landing (
1:59:30). The astronauts can first be seen 1 hour 20 min after landing when they leave the transport vehicle (
3:19:30).
In any case, it is more difficult to keep fit in an Apollo capsule than in the International Space Station, and substantially more challenging to readapt to terrestrial gravity in an Apollo capsule on water than in a Space Shuttle and a crew transport vehicle on ground.
Cheers, Wolfgang
The Apollo Space Program – A gigantic conspiracy?