Measure. Analyze. Learn.
This is the Hand Grip Heart Rate Monitor.
It's used to measure your heart rate.
So, it’s used in labs in the physiology manual,
the biology manual, that involve human exercise.
And so, you're using it to measure the heart rate.
It's one that's a wireless sensor.
I actually communicates from this hand grip, from here.
So, you end up holding it in your hand.
And, it sends the signal from your heartbeat,
from here, to this receiver.
And, the receiver is this piece.
And so, this piece is going to plug into,
in this case, my LabQuest 2, or whatever interface you're using.
And, it sends the signal from here, to the receiver,
picks up your heart rate, and actually measures
your heart rate in beats per minute and displays that.
A couple of issues here, in using this one.
You'll notice that there is an arrow here,
We suggest that you try to have this arrow in the same
orientation as the arrow on the hand grip piece.
And by holding it in the same orientation
you're more likely to get good data there.
We also suggest that you hold the hand grip unit
no more than about 80 centimeters from the receiver.
So, I can hold it like this and be ready to collect data.
Sometimes, we suggest maybe even taping the receiver down,
so that it doesn't move while you're doing this.
It's also key that you maybe keep this away from
other devices that generate electrical noise.
A computer, for example, can, it can actually pick up the signal
from that, and give you an erroneous value, because all
it can do is to pick up some signal, and be able to do that.
So, this piece, you obviously hold it in your hands.
It has a battery in here, and it lasts several years.
If it goes bad, there's some information in
our technical information library about
what size battery it is, and where you get that.
So, but, they last several years, and it's one of those
kind of, flat batteries there.
So, you're going to end up holding this in your hands.
It has a marker here that shows you where to place your hands.
Your hands, and, your hands ought to be clean.
Sometimes people put lotion or something like that
on their hands, and that can interfere with the ability
for the sensor to actually pick up your heart rate.
And, because the way this works, is it's actually measuring
the slight change in electrical potential across your hands
when your heart beats.
So, you become slightly polarized, and it actually measure that.
And, the device sees this slight increase in polarization.
So, it sees this voltage peak, and it just counts the peaks
in order to calculate your, the beats per minute, your heart rate.
And, you end up holding this in your hand there and pick it up.
Sometimes, also, these can become dirty, so you might need to
clean these, to make sure these are not coated with
something that will stop this.
Let's collect a little data.
And so, I, as usual, I need to plug in my sensor.
So, I'll just plug it in here, to channel 1.
And, we see here that the device comes up,
and we see our meter.
And, it says 'Heart Rate' there and it says beats per minute.
A common thing that will happen with this particular sensor
is that someone's already been using,
say, a temperature sensor, or some other sensor,
and they're accustom to seeing a number
show up on the meter screen.
When you do this one, there's no number that shows up,
because what it is, is it's actually the beats per minute.
And so, it has to calculate the beats per minute.
So, it doesn't display any value until
it's, actually, already collecting some data.
Because, what it's doing again is collecting
those changes in electrical potential.
So, it's akin to actually measuring your pulse for a period of time,
and then counting how many beats you counted
in a given amount of time.
And so, it's not uncommon for someone to plug that in
and say, "Wait, it's not working."
Well it doesn't show anything
until you actually begin collection here.
Let's take a look at our default collection parameters here.
We see 'Time Based' and so it's going to look at the
beats per minute as a function of time.
25 samples per second is how fast it's collecting
in order to see the heart rate.
And, it defaults to doing this for 10 minutes.
We assume, that you probably going to do something,
maybe doing some exercise, and so that's
the default time is 10 minutes.
We're ready to begin some collection.
So, I will go down here, and I will press the collect button.
Going to hold this in my hands.
And, you'll notice there, that there's a little symbol
on the screen, that's showing up there.
What's happening, again, is that there's a lag
between the time that it displays the heartbeat on the screen,
and me actually starting collection, because it's having to collect
a number of beats, for a unit of time, before it displays the value.
And so, that's what is happening there.
So as we go along here, it kind of, jumped up there,
and it's showing my heart rate there.
And so, it's displaying the default graph is beats per minute.
And, it's displaying that.
So, at this point, I could do something where I might start
to exercise to get my heart rate up.
And so, I could dance around, or do whatever,
and get my heart rate up.
I don't think…
I'm just going to sit here for a minute and let it, let it collect.
And now, I can stop data collection.
So, now that I have some data.
We can take a look at the analysis here.
And, we see that this part, when I began collection,
and I was talking, my heart rate was elevated.
And, when I stopped talking, and relaxed, it dropped down
to a different value there.
I might be interested in knowing something
about that numerically.
Maybe, I want to run the stats on this.
And, I can get my maximum and minimum heart rate.
Maybe, the average heart rate over that interval.
So, to do that, I could go to 'Analyze'.
And, I could go down to 'Statistics', and
check the box next to the statistics.
And, we see here in the meter:
my minimum heart rate was 71 beats per minute
at 170 seconds,
the maximum was 114, right there at the beginning,
at 20 seconds.
And, of course, it would give you an average value there too,
if you wanted to.
And so, that would allow you to analyze the data there.
So, the Hand Grip Heart Rate Monitor is used in the biology
and physiology manuals to measure human heart rate.