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good morning and welcome to mission

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control houston we have with us here

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today the principal investigator for a

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new experiment that's going up on the

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soyuz at the end of the month uh it's

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going to be helping the astronauts

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improve the exercise that they do in

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space to stay healthy and i think it's

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called four shoes so we've got andrea

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hansen who is again the principal

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investigator and a member of the

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exercise physiology and countermeasures

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lab here at johnson space center thanks

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so much for joining us hi brandi thanks

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for having me today so you've got a shoe

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with you what exactly is this

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i do this is the four shoe and this is a

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commercial off the shelf product

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a company called accents makes and it's

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a tool to help measure underfoot forces

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it looks like a goofy sandal but it's

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actually a high fidelity research tool

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and what it has included here are load

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cells underneath both the heel and the

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toe of the shoe that help us measure

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forces in three different directions and

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also torque that's the twisty motion you

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can kind of think of it as a high-tech

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bathroom scale

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okay well why why would we need this on

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the space station

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we're really interested in measuring

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exercise loads on the a-red the advanced

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resistive exercise device we can use

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that data in a lot of different ways

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why is why do we care about load what

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what is what is that i guess first of

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all and why do we care about it

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sure if you go into the gym and decide

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that you want to do say squat exercises

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you're going to put a certain amount of

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weights on that bar well a red works in

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a similar way except you're now

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exercising against the resistance of

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vacuum cylinders when you dial in a load

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on a red it's not an exact science so

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when you dial in 100 you might be

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lifting at 110 or maybe 90 give or take

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that 10 pounds on any given day

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depending on the performance of the

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system

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right now we don't have insight to the

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exercise load so it's important that we

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can measure that using tools like the

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horseshoe so we can better understand

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what we're asking the crew to exercise

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and is that something i guess you'll

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want to keep track on as they as they do

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their exercise

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absolutely we'd like to collect this

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load data every day during every

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exercise session but right now we're not

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getting any data from a red so we're

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looking at these portable load

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monitoring tools to help us collect that

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data i know the astronauts do quite a

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bit of exercise to stay healthy and it

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seems like it's been working pretty good

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we've kind of got it down so how will

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these how will these measurements help

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us with that

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absolutely since the a red and the new

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treadmill were installed in late 2009

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and early 2010 the crew have been coming

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back a lot stronger but we know we have

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work to do they're coming back with

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stronger muscles and even some increased

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quality in bone but we're still worried

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about the strength of their bone and the

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quality of the the inside of their bone

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and how that strength is going to be

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compromised when they come back to earth

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so we know we have work to do okay have

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you have you tried these on yourself

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yes i have tried the shoes on um they

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are really a pretty comfortable sandal

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they're a little stiff so we don't run

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in these shoes and we don't do a lot of

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jumping but to stand and take a static

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load measure they are they measure very

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accurately seeing another picture of

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them here on the on the screen and a

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good view of the the force measurement

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or load measurement uh

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devices on the bottom there um how many

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crew members are going to be wearing

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these

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we have two crew members going up

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launching on may 28th who are going to

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participate in the four shoe evaluation

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and that's reid wiseman and alex alex

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gerst both of those crew members will be

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helping us evaluate the shoe and

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understanding how accurate we can get

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the measures during a red exercise

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and how will you how do you what i guess

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what gets the data to the ground is it

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do you bring the shoes back or is it

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transmitted or the data is going to be

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collected real time on a space station

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computer during the evaluation so the

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test itself is pretty simple we're going

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to have the crew dial in a number of

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loads on a red anywhere say from 0 to

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100 200 and higher at 25 pound

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increments we're going to look at that

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data in the repeated

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measures that we asked the crew to take

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to look for repeatability in the in the

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load data in those measures between the

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crew members and also in their

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individual sessions that'll help us

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determine if these four shoes are

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performing and behaving as we'd expect

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while in use with a red

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what would what would i guess decide if

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they're performing well

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it would so what we're going to be

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looking at is to make sure that when we

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take a static load measure say at a 50

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pound load that when we take it three or

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four times in a row it gives us that

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same number so it's whether

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they match what you're expecting from

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the exercise machine or

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yeah we're not really interested in say

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calibrating the exercise machine at this

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point in time we just want to make sure

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we dial in the same load every time to

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look to see if that load measure is

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repeatable once we decide that this tool

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is working appropriately and as expected

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in space then we can go back and kind of

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do some of that fine tuning but right

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now we're just making sure the tool

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works so gersten and weisman are

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basically just checking it out and then

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future astronauts will be using it in a

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different way absolutely it works yes

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what our hope is is that one the shoes

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work well and do give us that accurate

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data and then we can apply these shoes

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and use them in our future research

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studies we can use this kind of data to

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do things like

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evaluate human motion

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and perform the future arid biomechanics

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study where we look at joint motion and

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the forces applied at different points

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on the body

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so now you said these are commercial

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off-the-shelf products is it something

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that would be helpful to people on earth

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as well or is it just of interest to us

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in space yeah it sure could right now we

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largely do biomechanics studies in

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laboratory settings

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it usually involves a lot of big

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equipment heavy equipment that's

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installed in long gateways what portable

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load monitoring tools like the foreshoe

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allow us to do is take the science to to

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the outside to remote areas like space

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station or even out into

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your everyday life situation so we can

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look at how people walk around and move

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doing their everyday activities okay

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well that's really interesting thanks so

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much and i guess we'll look forward to

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hearing how it works out and maybe

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seeing them more in use on the space

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station in the future sounds great thank

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you so much again this was andrea hansen

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who is the principal investigator for

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the force shoes experiment that's going

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up on the soyuz at the end of the month