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we often talk about new and ongoing

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experiments onboard the station but

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today we're going to talk about one

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that's complete and now providing some

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interesting results laurie meings at the

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payload operations integration center at

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the marshall space flight center in

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huntsville alabama is going to tell us

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more about the integrated cardiovascular

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experiment

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was recently named one of the most

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compelling studies from the iss today we

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learn more about this study and how the

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results are already helping folks here

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so the integrated cardiovascular study

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was one done to look at the long-term

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effects of

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space flight on heart

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size heart function

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and how those interplay with the risk

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for cardiac arrhythmias

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why was it important to study this in

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space yeah it was important because we

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know from

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ground-based analogs for space flight

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bed rest studies

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and some flight studies that the heart

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tends to get smaller

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with less activity

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you know in the past the countermeasures

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in space weren't as good and astronauts

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hearts would shrink the muscle would get

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smaller the heart is muscle and like any

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other muscle the more you work it the

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bigger it gets and the less you work it

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the more it atrophies

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so the astronauts hearts would get

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smaller the volume in the hearts would

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get smaller and there was one report of

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a cardiac arrhythmia on an astronaut who

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was on the mirror space station about

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two months into his stay so the concern

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was that these changes in heart function

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and size could lead to possible

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arrhythmias and

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besides just the arrhythmias lead to

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problems when you land from space you

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know

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spending six months in space going from

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earth to mars landing having to function

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especially in an emergency situation is

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very important

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the study had 13 astronauts four of them

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women they came from expedition 20 all

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the way through expedition 34. there was

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a lot of pre-work for this bed rest

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studies where we had patients spend five

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weeks in bed do supine cycling

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rowing orgometry all these things versus

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controls looking at exercise changes

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with heart function and muscle thickness

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so i know you have results now but i'm

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kind of curious you had four women

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the rest men were there any difference

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there

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you know so far we haven't really seen a

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difference between the men and women but

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it's not a large number of either and so

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it's hard to say that we've had enough

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to find that difference but i think

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important that in what we've seen

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it looks about the same interestingly

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heart function

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before and after four to six months of

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spaceflight really stays the same

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there's no change in how well the heart

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squeezes how much blood it pumps how

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thick the muscle gets and i think that

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really speaks to how well the

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countermeasure is on the space station

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right now and they have two hours of

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exercise time built into the system not

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sure that it's always done but it what

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they do

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seems to be very effective

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what do you hope

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comes from this experiment what should

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come out of that and why should people

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on earth care about it the two things

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that i'm most concerned into this study

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is

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long duration space flight and if we go

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through with interplanetary travel

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near earth objects

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than to make sure that the heart isn't

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compromised in such a way over

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six months in space that that the

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astronaut can't function when they land

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and i think that's very important

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besides that there are some

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results that are relevant to earth right

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now

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for example one of them is athletes the

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way the athlete heart changes with

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exercise training and when they stop

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training

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is very relevant to the information we

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get from the space station and vice

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versa we're learning constantly more

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things about it that we can apply to

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athletes who come in with heart problems

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in the same way there's a

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population of patients who have

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something called potts disease postural

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orthostatic tachycardia syndrome and

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these are mostly women

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they're young usually and they have

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difficulty standing upright for very

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long periods of time

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historically they've exercised a lot and

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then something happens and they stop

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they get pregnant they get injured and

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when they stop exercising their hearts

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shrink just like we worry about in the

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astronauts

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well using the exercise program we

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developed in bed rest and have been

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using to help the astronauts on the

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space station we made an exercise

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program for these pots patients and it

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has

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been a great cure for many of the

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patients

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and

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very pleased with the outcome of that

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the exercise is able to make their

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hearts larger make them stronger and now

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they're able to lead more

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normal realistic lives

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so how does the common everyday person

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learn about these countermeasures learn

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about the exercise programs

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i think part of the outreach of this is

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for specifically the pots program there

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are a few national centers that really

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focus on potts patients but besides that

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i think an important idea is that

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exercise is beneficial for anybody who's

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aging healthy aging

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population needs to be exercising we

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know that

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the amount of fitness somebody has in

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mid-life really relates to long-term

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mortality and the kind of exercise the

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astronauts are doing on the space

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station keeps their hearts strong and

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flexible and young and if everybody

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can start to move that way then

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people will be more functional as they

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age happier as they age feel better

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so i better get out of here as quick as

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i can and go for a run you're taking a

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live look now at the payload operations

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integration center busy at work this

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morning helping with some of those

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robonaut

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activities and anything else that the