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Astronaut Fitness
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NASA Sci Files segment describing astronaut strength and conditioning programs to combat physiological losses in space.
Hi, Mr. Shepard.
00:00:00
Hi, you must be Tony. I understand you have some questions for me.
00:00:03
Yes, our friend Jacob quarantined himself in the treehouse to avoid getting sick,
00:00:07
but we don't think that's a very good idea.
00:00:11
Isn't exercise important for staying healthy?
00:00:14
Yes, exercise is very important in maintaining a healthy body.
00:00:16
As the lead astronaut strength, conditioning, and rehabilitation specialist
00:00:19
here at Johnson Space Center, my main responsibility is to design and implement
00:00:23
strength and conditioning programs for the astronaut corps
00:00:27
so they can remain healthy here on Earth and in space.
00:00:30
Astronauts exercise in space?
00:00:34
Yes, but it begins here on Earth.
00:00:36
There are three segments to the astronaut fitness program.
00:00:38
First, there is the pre-flight training phase,
00:00:41
where we work on improving the astronauts' weaknesses and enhancing their strengths.
00:00:43
With only microgravity in space, why do astronauts have to be strong?
00:00:48
Sometimes astronauts need to perform an extravehicular activity, or EVA for short.
00:00:52
This is where they go outside the spacecraft
00:00:56
and sometimes work on a satellite or the space station.
00:00:58
An EVA is very strenuous work, and it requires a lot of strength.
00:01:02
What is the second segment of training?
00:01:06
Well, the second segment is in-flight training,
00:01:08
where the astronaut focuses on maintaining or increasing their level of fitness
00:01:10
and limiting their physiological losses.
00:01:15
What are physiological losses?
00:01:18
Living in a microgravity environment can cause bone and muscle loss,
00:01:20
a reduction in cardiovascular responses,
00:01:24
and a decrease in the neuromuscular system.
00:01:26
Exercise can help decrease those losses
00:01:29
and can even make you feel better mentally by increasing your endorphins or your happy hormones.
00:01:31
Why does your body lose bone and muscle in space?
00:01:37
In a microgravity environment, everything is floating, including yourself,
00:01:40
and it makes living pretty easy since you don't have to lift, pull, or push very much.
00:01:44
Therefore, the body tells itself that it doesn't need to keep the muscles strong or the bones dense.
00:01:48
And the heart figures out that it doesn't need to work very hard
00:01:53
since the blood can float where it needs to go.
00:01:56
How do astronauts exercise in space?
00:01:58
On the International Space Station, there is a cycle ergometer, a treadmill, and a weight-lifting device.
00:02:00
Astronauts exercise about two and a half hours a day.
00:02:05
Wow, that must help.
00:02:08
Exercise is very important in maintaining a healthy body and a good mental attitude at all times.
00:02:10
Thank you, Mr. Shepard. You've given us a lot of information.
00:02:15
You're welcome, and call if you need any help putting together a fitness program for Jacob.
00:02:18
NASA Jet Propulsion Laboratory, California Institute of Technology
00:02:22
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- Idioma/s:
- Niveles educativos:
- ▼ Mostrar / ocultar niveles
- Nivel Intermedio
- Autor/es:
- Office of Education
- Subido por:
- EducaMadrid
- Licencia:
- Reconocimiento - No comercial - Sin obra derivada
- Visualizaciones:
- 456
- Fecha:
- 28 de mayo de 2007 - 15:32
- Visibilidad:
- Público
- Enlace Relacionado:
- NASAs center for distance learning
- Duración:
- 02′ 24″
- Relación de aspecto:
- 4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
- Resolución:
- 480x360 píxeles
- Tamaño:
- 14.53 MBytes
