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Benefits of Sleep - Contenido educativo
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In the second segment of the Right Ratio of Rest: Proportional Reasoning, R.J. talks with Dr. Charles Czeisler about what the circadian clock is and what it does in the body. Dr. Charles Czeisler also discusses the factors that influence the circadian clock and the benefits of sleep.
I checked the internet and found that much of NASA's sleep research is being conducted
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in cooperation with Harvard Medical School through the National Space Biomedical Research
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Institute.
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Right now I'm looking for Brigham and Women's Hospital.
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That's where Dr. Charles Zeisler works conducting sleep research for NASA, inside specially
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designed rooms.
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By varying the lighting over time, he's helping astronauts understand the sleep challenges
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they may face when they travel to the moon, Mars, or planets beyond.
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Dr. Zeisler, what is a circadian clock?
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All living organisms have a circadian or biological clock.
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In mammals, it's located within the brain.
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This clock helps to synchronize body functions with the external environment.
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Through its connections with the eye, the brain receives information about the external
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light-dark cycle.
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By coordinating the body's biological clock with sunrise and sunset, the clock resets,
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helping to synchronize the rhythms that optimize the body for daily living.
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Without light-dark cues, most individuals would go to bed and wake up later each day.
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Why is that?
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R.J., it's because most people's biological clocks are set to cycle with a slightly longer
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than 24-hour period.
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Astronauts typically lose two hours of sleep every night.
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Once they are seven to ten days into a mission, their performance can be impaired as if they
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had stayed up all night.
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Can't you just catch up on your sleep later?
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Not really.
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In some situations, sleep loss can't be avoided, R.J., but it's something that everybody should
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try to limit.
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Our research shows that the body needs a consistent amount of sleep each night, particularly during
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growth and development.
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Take your case, R.J.
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Studies show that you need nine to ten hours of sleep each night to perform your best in
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school and on the field.
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Loss of sleep also impairs learning and memory.
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So R.J., sleep isn't just necessary for brain development.
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It's also critical for body development as well.
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As you sleep, chemicals in the brain called hormones are released, which cause your body
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to grow and mature.
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Whoa.
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So if you're saying I sleep more, I'll grow more.
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Yes.
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The hormones that you release while you sleep are necessary for your growth and development
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into an adult.
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Other factors that can affect sleep are physical activity, mealtimes, and medicines.
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And caffeinated drinks like soda, tea, and coffee can really disrupt sleep.
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In addition to getting enough sleep, researchers have discovered that the color of light affects
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your biological clock.
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We've learned that sleep disruption and exposure to certain wavelengths of light suppress those
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important growth and maturation hormones.
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R.J., this is one of the machines we use to measure the benefits of the different wavelengths
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of light.
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Want to check it out?
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We found shorter, bluer wavelengths of light, like those we see looking at the Earth's blue
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sky, are much more effective for resetting our circadian clock.
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Now let's see what a Martian sky is like.
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Whoa, this is different.
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Longer, redder wavelengths of light, like those in the Martian sky, are less successful
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at resetting our circadian clocks.
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When we plan for future exploration of Mars, we will need to think about how the biological
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clock will respond to the unearthly color of the Martian skies.
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Wow, that's a lot to think about.
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Our research with the color of light may reveal unknown benefits to us.
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But R.J., here's the bottom line.
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If you get enough sleep, you'll be more alert, your athletic performance will improve, and
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you'll have faster reaction times.
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Maintaining a good sleep schedule, eating a healthy, well-balanced diet, and following
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an exercise regimen all contribute to better minds and bodies.
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They're the three pillars of good health.
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You have to have the right ratio between rest and activity to be your best.
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For someone your age, that would be a ratio of nine hours of sleep out of a 24-hour day.
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R.J., what does your schedule look like?
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Well, I get up at 6.30 and try to catch the bus at 8.
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Sometimes I'm late for school.
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At 8.30, school starts and I'm in the building until 2.30.
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Then I go to track practice from 3 to 6.
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I rush home, do my homework in my room.
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Eat around 8 or so, study some more, and try to go to sleep around 11.
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Next day, I'm up at 6.30, and the process begins all over again.
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What about weekends?
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Well, I stay up late to watch good TV shows, and then I get up about 10.30.
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In the afternoon, I might lie around the house to catch up on some rest.
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R.J., you're not getting enough sleep.
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Could you help me figure out a better schedule that will help me get the sleep I need?
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Sure. Let me work on it and get back to you later.
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Thanks. Any help you could give me would be appreciated.
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- Idioma/s:
- Materias:
- Matemáticas
- Niveles educativos:
- ▼ Mostrar / ocultar niveles
- Nivel Intermedio
- Autor/es:
- NASA LaRC Office of Education
- Subido por:
- EducaMadrid
- Licencia:
- Reconocimiento - No comercial - Sin obra derivada
- Visualizaciones:
- 1880
- Fecha:
- 28 de mayo de 2007 - 16:54
- Visibilidad:
- Público
- Enlace Relacionado:
- NASAs center for distance learning
- Duración:
- 04′ 55″
- 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:
- 29.62 MBytes
