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astronauts who live and work for long

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periods of time in the weightless

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environment of space suffer the loss of

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some bone and muscle strength since

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their bones and muscles have much less

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work to do

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nasa scientists have been working to

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find countermeasures to keep astronauts

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fit and strong one of those experiments

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underway on board the international

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space station is called sprint recently

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i spoke with the principal investigator

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dr laurie ploutz snyder and i asked her

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to describe what sprint is investigating

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so sprint is an exercise program that

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we're testing on the space station that

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is evaluating the use of higher

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intensity but lower duration and

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frequency exercises

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and we're looking to protect the

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cardiovascular system so aerobic fitness

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and skeletal muscle strength and

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endurance and muscle fitness and also

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bone health okay so let's talk about the

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space gym it is

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got three main pieces of equipment up

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there we have the treadmill we have the

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stationary bicycle and we also have that

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resistive exercise device that simulates

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weight lifting here on it so it's for

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strength training

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so all three of those um pieces of

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equipment are being used for crew

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members who are on the

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sprint program and the others are also

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using it as well so can you tell me

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what's the difference sure everyone uses

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the same equipment the bicycle the

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treadmill and the weightlifting the

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sprint participants do a special program

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where they do the weightlifting three

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days a week instead of the usual six

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days a week so they're doing half the

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number of sessions but the sessions that

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they do do are harder workouts

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and then for the aerobic exercise they

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can switch off between the treadmill and

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the cycle we like them to use the

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treadmill at least two-thirds of the

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time is the recommendation

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and for that they do special exercise

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protocols we have four different

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protocols that they switch off between

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one is as short as 30 second intervals

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so the whole workout is only eight or

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nine minutes including the warm-up

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and then there's uh two minute intervals

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four minute intervals and a half an hour

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continuous

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so shorter high intensity versus the

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longer low intensity exactly

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the prescribed so where did where did

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the idea come from the idea from this

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came actually from about 20 years of

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ground research much of which was funded

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by nasa and 50 years of exercise

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experience in space flight and we

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brought all of that we had learned from

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all of these things together to look at

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what do we think would be the most

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effective and the most efficient

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exercise program okay so have we done

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any of the um

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the the kind of the sprint protocol

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here on earth with any of the crew

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members before they go

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how does that work yeah so any of the

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crew members who sign up for sprint

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they get to practice these protocols on

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the ground to make sure that they like

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on them and that they know how to do

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them and that this is going to work for

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them because if you haven't done these

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high intensity intervals before it takes

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a little getting used to okay sure

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all right so

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um overall are there any we know the

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health benefits for bone and muscle

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that's what we've been looking at are

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there any other benefits that that they

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could possibly we're seeing a lot of

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benefits for cardiovascular fitness so

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the heart and the breathing and the

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overall endurance okay very interesting

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and so i understand this experiments

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running through expedition 44

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what do you hope to be able to offer

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crew members after this

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really there's two main things we hope

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to offer one is an optimized

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prescription that can be used on station

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for

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different durations so six months 12

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months if we ever do anything longer so

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we hope to deliver an optimized exercise

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prescription but equally as important we

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hope to learn a lot about why the

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exercise program works and what parts

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work in different ways so that we can

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recommend exercise programs for our next

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missions our long-duration exploration

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missions and also

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to know what requirements we need for

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the next generation of exercise hardware

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so the exercise equipment that goes to

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mars will probably look a lot different

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than today's equipment and do we have

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any um

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results back are we seeing anything well

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we've had five crew members complete the

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sprint active program that that's this

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new high-intensity prescription and

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they're doing very well so far so

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it's meeting our expectations

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uh the feedback has been good

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some of the crew members say it's a

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pretty tough workout yeah but um we have

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it spaced so that there are recovery

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periods in between and i would imagine

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as well that with the shorter durations

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the high intensity that that allows more

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crew time

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for other activities or it could i mean

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instead of every day long duration you

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know the whole two-hour

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exercise session so um also do you feel

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that any of your research that you're

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doing in this study is um

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going to apply how will it apply to us

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here on earth for for people maybe

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um who are suffering from osteoporosis

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or anything like that yeah sure

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so a lot of the things we're learning

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scientifically will

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help with the understanding of

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physiology but from the practical point

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of view we would all love a very

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effective short workout that we could

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get in during our lunch time or by not

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taking up a whole lot of our day and so

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there's a lot of

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a lot of interest out there in the

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regular community for what is the most

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efficient workout that would give you

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great benefits without a lot of time

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correct great well it's all very very

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interesting i love the the you know the

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health and fitness is obviously very

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important to us here on earth but it's

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more so for uh crew members who are

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there aboard the international space

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station so thanks so much for coming out