A Quote by Neil deGrasse Tyson
With no gravitational force to work against, your body not only doesn't need the same amount of muscle and bone, it starts breaking them down. As on Earth, so in space: use it or lose it. And exercise may not solve the problem.
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The wealth and prosperity of the country are only the comeliness of the body, the fullness of the flesh and fat; but the spirit is independent of them; it requires only muscle, bone and nerve for the true exercise of its functions. We cannot lose our liberty, because we cannot cease to think.
One of the biggest concerns about going out beyond lower Earth orbit is the radiation. We find that exercise seems to counteract a lot of the negative effects of space flight, like bone loss and muscle atrophy and cardiovascular systems issues. We exercise two hours a day on the station, which is a huge hit out of your day. It's great for staying in shape, but you know, it cuts into the productivity of the crew and if you look at how expensive it is to get a crew into space, if we can keep them healthy and have them exercise, but spend less time doing it, we can get more done.
So long as men desire to live together, no man may initiate the use of physical force against others. . . . When a man attempts to deal with me by force, I answer him by force. It is only as retaliation that force may be used and only against the man who starts its use. No, I do not share his evil or sink to his concept of morality: I merely grant him his choice, destruction, the only destruction he had the right to choose: his own.
Other anatomical changes associated with long-duration space flight are definitely negative: the immune system weakens, the heart shrinks because it doesn't have to strain against gravity, eyesight tends to degrade, sometimes markedly (no one's exactly sure why yet). The spine lengthens as the little sacs of fluid between the vertebrae expand, and bone mass decreases as the body sheds calcium. Without gravity, we don't need muscle and bone mass to support our own weight, which is what makes life in space so much fun but also so inherently bad for the human body, long-term.
The libertarian approach is a very symmetrical one: the non-aggression principle does not rule out force, but only the initiation of force. In other words, you are permitted to use force only in response to some else's use of force. If they do not use force you may not use force yourself. There is a symmetry here: force for force, but no force if no force was used.
We were doing something called telemedicine, where we were using the ultrasound. One interesting application of this ultrasound is the possibility that you could possibly use it to measure critical bone areas during a long space mission and track if you're losing bone in these areas. On Earth, when they check you for bone loss, you get in this big machine. It's the size of a room and it's got a platform with an x-ray that scans your whole body and in critical areas and it takes a while and it just wouldn't be practical to have a machine like that in space.
One of the things I found as a dancer is that you're trying to perfect your body but also protect it and keep it injury-free. When you work against your own weight, you're still building lean muscle and bone density, but you're in a safer zone.
I think it's going to be a very important, unique data set in terms of measuring the behavior of your lower body in space and trying to figure out what we can do to preserve bone and muscle density.
I can only wonder what astronauts must feel like or something like that when you're really in the space of silence and you are feeling and breathing in a way that you're really aware of your muscle and bone and the breath and the body and the movement and all of those things that just you take for granted in the urban landscape.
No man may initiate the use of physical force against others. No man-or group or society or government-has the right to assume the role of a criminal and initiate the use of physical compulsion against any man. Men have the right to use physical force only in retaliation and only against those who initiate its use. The ethical principle involved is simple and clear-cut: it is the difference between murder and self-defense.
We cannot solve a problem by saying, "It's not my problem." We cannot solve a problem by hoping that someone else will solve it for us. I can solve a problem only when I say, "This is my problem and it's up to me to solve it."
If you go on a calorie-reduced diet without increasing your level of exercise, at a certain point, your body will lose a little weight and then plateau. You need to trick your body to burn more fuel than you're ingesting so you can continue to lose weight.
Observation is like a muscle. It grows stronger with use and atrophies without use. Exercise your observation muscle and you will become a more powerful decoder of the world around you.
I think the best exercise that I do is singing for an hour-and-a-half out on the stage, because, yes, I use the lung, the biggest muscle in your body.
Some of you guys are sitting down, some of you guys are standing up. But if you really take a moment and you go inside your body, you can feel your weight against the earth, and you can recognize that you're the only person who's feeling your own weight against the earth right now.
As soon as you hear a fighter say, "I'm working smarter, not harder," you always want to bet against that guy. That mentality does not work. You have to work hard. And sometimes that means you are going to work too hard. You are going to decline. You are going to tear down your body and your muscle fibers. You are going to get sick.
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