0:00:05 > 0:00:08# If you've got a question and you don't know where to go
0:00:08 > 0:00:12# Ask Nina for some help cos she's got a science show
0:00:12 > 0:00:14# She makes sense of her senses while helping all her fans
0:00:14 > 0:00:17# By doing her experiments with potions and with bangs
0:00:17 > 0:00:19- # Touch your tongue - Tongue!
0:00:19 > 0:00:20- # Fingers - Fingers!
0:00:20 > 0:00:22- # Eyes!- Eyes!- Ears!- Ears!
0:00:22 > 0:00:23- # Nose!- Nose!
0:00:23 > 0:00:26# Nina and the Neurons find out what you need to know
0:00:26 > 0:00:29# Nina and the Neurons find out what you need to know
0:00:29 > 0:00:32# Luke he helps us with our eyes and Felix with our touch
0:00:32 > 0:00:36# Ollie sniffs out smells and scents and Belle she hears so much
0:00:36 > 0:00:38# Bud is Ollie's brother he helps us with our taste
0:00:38 > 0:00:41# They're Nina's little Neurons and they're coming to your place
0:00:41 > 0:00:43- # Touch your tongue - Tongue
0:00:43 > 0:00:44- # Fingers - Fingers
0:00:44 > 0:00:46- # Eyes- Eyes- Ears- Ears
0:00:46 > 0:00:47- # Nose- Nose
0:00:47 > 0:00:50- # Nina and the Neurons find out what you need to know- Yeah!
0:00:50 > 0:00:53# Nina and the Neurons find out what you need to know
0:00:53 > 0:00:55# Oh, yeah! #
0:00:56 > 0:01:00Wooh! Oh, hello there.
0:01:00 > 0:01:04I'm just about to do an experiment to see how fast my swimmer
0:01:04 > 0:01:06friend can swim across this tub of water.
0:01:06 > 0:01:10So, let's see. Good luck!
0:01:11 > 0:01:15Go, go! You're doing really well. What a great swimmer.
0:01:15 > 0:01:16BEEP BEEP
0:01:16 > 0:01:21Oh, I hear a beep, I see a flash, I wonder what they're going to ask.
0:01:23 > 0:01:26- BOTH: Hi, Nina.- Hi!
0:01:26 > 0:01:28We've got a question for you.
0:01:28 > 0:01:29How do we swim?
0:01:29 > 0:01:33That's a great question. "How do we swim?"
0:01:33 > 0:01:35Swimming is a really fun sport
0:01:35 > 0:01:38but how do our bodies move through the water when we swim?
0:01:38 > 0:01:42Why don't you come down to my lab and we'll investigate?
0:01:42 > 0:01:45- BOTH: See you soon, Nina. Bye.- Bye!
0:01:45 > 0:01:49Well, I'm going to need some help to answer this one
0:01:49 > 0:01:50and I know just who to ask.
0:01:50 > 0:01:53OK, Neurons, time to get to work.
0:02:07 > 0:02:10ALL: Neurons at the ready, Nina.
0:02:10 > 0:02:13OK. Today's question is, "How do we swim?"
0:02:13 > 0:02:17Which Neuron will be most useful in helping us find the answer?
0:02:17 > 0:02:20ALL: Me! Me! Me! Oh, me!
0:02:20 > 0:02:23Will it be fabulous Felix?
0:02:23 > 0:02:26I can help so very much if you need the sense of touch.
0:02:26 > 0:02:28Will it be beautiful Belle?
0:02:28 > 0:02:33I send messages to brain from ear. If there's a sound, I'll help you hear.
0:02:33 > 0:02:35Will it be lovely Luke?
0:02:35 > 0:02:37For looking and seeing, day or night,
0:02:37 > 0:02:39I'll help you with your sense of sight.
0:02:39 > 0:02:41Will it be awesome Ollie?
0:02:41 > 0:02:44If it's pongy or whiffy but you can't tell,
0:02:44 > 0:02:48- my messages help your sense of smell. - Or will it be baby Bud?
0:02:48 > 0:02:53Sour, salty, bitter or sweet, I'm your taste buddy whenever you eat!
0:02:56 > 0:02:58It's Felix!
0:02:58 > 0:02:59CHEERING
0:02:59 > 0:03:05ALL: Go, Felix! Go, Felix! Go, Felix! Go, Felix!
0:03:07 > 0:03:10Marvellous! A little touch can mean so much, Nina.
0:03:10 > 0:03:13Today's question is, "How do we swim?"
0:03:13 > 0:03:16When we're swimming, we feel the water all around us
0:03:16 > 0:03:19so, Felix, our touch Neuron, will be helping us.
0:03:19 > 0:03:24I need to get the lab ready before the experimenters arrive.
0:03:25 > 0:03:28Olivia loves eating pizza.
0:03:28 > 0:03:30Nina loves baking.
0:03:31 > 0:03:34I like floating on my back.
0:03:34 > 0:03:36I like jumping in.
0:03:36 > 0:03:39But they both want to know, "How do we swim?"
0:03:39 > 0:03:44So, today, for one day only, Nina and Olivia become the experimenters!
0:03:49 > 0:03:50- Hi, guys.- BOTH: Hi, Nina.
0:03:50 > 0:03:54Welcome to my lab and thank you for your great question,
0:03:54 > 0:03:55"How do we swim?"
0:03:55 > 0:03:58To find out, let's start by using our senses.
0:03:58 > 0:04:03ALL: Whoop whoo! A senses experiment! We're ready, Nina.
0:04:03 > 0:04:07Now, there are quite a few styles of swimming, aren't there?
0:04:07 > 0:04:12- Can you name any?- Crawling.- Yeah. Can you think of any?- Breaststroke.
0:04:12 > 0:04:16That's right. Very good, guys. Let's take a look at some.
0:04:16 > 0:04:18This is the breaststroke.
0:04:18 > 0:04:22Your arms go forward and then we pull them back Can you try?
0:04:22 > 0:04:25Forward, then pull them back. That's it. Keep going!
0:04:25 > 0:04:28Ooh! Good!
0:04:28 > 0:04:30THEY GIGGLE
0:04:31 > 0:04:35Oh! That feels simply marvellous.
0:04:35 > 0:04:37Now, what about this one?
0:04:39 > 0:04:40This is the front crawl.
0:04:40 > 0:04:44You put your arm in front of you and pull it under
0:04:44 > 0:04:46the water and then do the same with
0:04:46 > 0:04:49the other arm, so you guys do it too.
0:04:49 > 0:04:52Oh, very good. Very good.
0:04:52 > 0:04:56What about the doggy paddle, Nina?
0:04:56 > 0:05:00Oh, yes! Let's not forget my favourite stroke, the doggy paddle.
0:05:00 > 0:05:01Oh, thanks, bud.
0:05:04 > 0:05:05So, look carefully
0:05:05 > 0:05:09and tell me what parts of the swimmers body are moving.
0:05:09 > 0:05:11- Their arms and legs, Nina. - That's right.
0:05:11 > 0:05:15When we're swimming, we use our arms and our legs.
0:05:15 > 0:05:20But how do they help us move through the water? Let's get experimenting!
0:05:20 > 0:05:23So, we know that we move our arms in different ways when we're
0:05:23 > 0:05:28swimming different strokes, but why do you think we move them?
0:05:28 > 0:05:33- To go through the water.- Yes. Our arms pull us through the water.
0:05:33 > 0:05:36When we're swimming, our hands are a bit like a paddle
0:05:36 > 0:05:40and they pull us through the water like this.
0:05:40 > 0:05:43Do you want to try? Make your hand like a paddle.
0:05:43 > 0:05:44Listen!
0:05:44 > 0:05:47Slosh, slosh, slosh.
0:05:47 > 0:05:49What did it feel like?
0:05:49 > 0:05:52It feels like we're pulling the water.
0:05:52 > 0:05:57So, their hands act like a paddle which means you can pull more water.
0:05:57 > 0:06:01And move through the water more easily!
0:06:01 > 0:06:03That's right. Well done, Neurons.
0:06:03 > 0:06:08This is a great shape for our hands and our arms when we're swimming
0:06:08 > 0:06:13because we pull lots of water towards us and it helps us to move.
0:06:13 > 0:06:17But what about our legs? How do they help us swim?
0:06:17 > 0:06:20Time for another experiment and I know just the place.
0:06:20 > 0:06:24Oh, it's somewhere warm and bright with lovely, clear blue water.
0:06:24 > 0:06:25Let's go!
0:06:31 > 0:06:34Hmm. Where do you think we're going today?
0:06:34 > 0:06:39Somewhere bright with clear blue water? I can't wait!
0:06:39 > 0:06:44- A beautiful lake, perhaps?- No! I hope it's the seaside!
0:06:44 > 0:06:48Something's got a strong smell but it's not the seaside.
0:06:48 > 0:06:52I can smell chlorine. It's a swimming pool!
0:06:53 > 0:06:57So, we know you both can swim and you should always swim with an
0:06:57 > 0:07:02adult and to keep an eye on us, we have Chris, our lifeguard.
0:07:02 > 0:07:03- Hi, Chris. - BOTH: Hi!
0:07:03 > 0:07:05- CHRIS:- Hi, guys.
0:07:05 > 0:07:08Now, you're both holding floats which means you won't be
0:07:08 > 0:07:11using your arms, just your legs.
0:07:11 > 0:07:14Can I ask you to kick your legs and we'll see what happens?
0:07:14 > 0:07:16Go!
0:07:18 > 0:07:20And stop!
0:07:21 > 0:07:25- So, what happened there? - We moved forward.- Yes.
0:07:25 > 0:07:29You weren't using your arms but your legs pushed you through the water.
0:07:29 > 0:07:31Well done.
0:07:31 > 0:07:33This time, you're holding on to the side
0:07:33 > 0:07:36and I want you to try kicking again.
0:07:36 > 0:07:40ALL: Yay! Splish, splosh, splish, splosh, splash!
0:07:40 > 0:07:43Stop kicking and relax.
0:07:44 > 0:07:48Oh! Now, what happened to your legs when you stopped kicking?
0:07:48 > 0:07:51- They dropped down in the water. - That's right.
0:07:51 > 0:07:55Kicking keeps your legs up near the surface
0:07:55 > 0:07:59and also helps to keep your body flat in the water.
0:07:59 > 0:08:01Why does a flat body help, Nina?
0:08:01 > 0:08:03Great question, Belle.
0:08:03 > 0:08:07Keeping our bodies as flat as possible makes it easier to
0:08:07 > 0:08:09move through the water when we swim.
0:08:09 > 0:08:12So, now we know that our arms pull us through the water
0:08:12 > 0:08:15and our legs push us through the water.
0:08:15 > 0:08:18But which one helps us most with our swimming?
0:08:18 > 0:08:20Time for an experiment.
0:08:22 > 0:08:25So, your question was, "How do we swim?",
0:08:25 > 0:08:29and we've discovered that swimmers use their arms and legs
0:08:29 > 0:08:32in different ways and these are called swimming strokes.
0:08:32 > 0:08:36Let's look at Ruaridh and Alistair swimming.
0:08:37 > 0:08:40Do you know what stroke they were doing?
0:08:40 > 0:08:41The breaststroke.
0:08:41 > 0:08:45Ruaridh and Alistair did the breaststroke at the same speed
0:08:45 > 0:08:49but this time, Ruaridh is only going to use his arms
0:08:49 > 0:08:52and Alistair is only going to use his legs.
0:08:52 > 0:08:54So, who will be fastest?
0:08:54 > 0:09:00- I think the one using their arms. - I think the one using their legs.
0:09:00 > 0:09:03Well, let's see. Are you ready, swimmers?
0:09:05 > 0:09:08Ready, steady, go!
0:09:08 > 0:09:12ALL: Yes! Come on! Go on! You can do it!
0:09:23 > 0:09:29Now, watch carefully. Ruaridh is pulling the water with his arms
0:09:29 > 0:09:33and hands and Alistair is pushing the water with his legs.
0:09:33 > 0:09:35Froggy legs is leading.
0:09:43 > 0:09:45So, who finished faster?
0:09:45 > 0:09:48- The legs-only swimmer, Nina.- Yes!
0:09:48 > 0:09:53Alistair, who was using his legs to push through the water, won.
0:09:53 > 0:09:57And that's because in the breaststroke, our legs help us
0:09:57 > 0:10:00to move much more than our arms do.
0:10:00 > 0:10:05So, let's try the same experiment again but with front crawl.
0:10:11 > 0:10:15But this time, Ruaridh is only going to use his arms
0:10:15 > 0:10:17and Alistair's only going to use his legs.
0:10:17 > 0:10:19Who do you think will win?
0:10:19 > 0:10:23- Arms only, Nina.- Legs only.
0:10:23 > 0:10:28OK, well, let's see. Are you ready, swimmers?
0:10:28 > 0:10:31Ready, steady, go!
0:10:34 > 0:10:38You can see that Ruaridh is pulling the water
0:10:38 > 0:10:43with his arms and hands and Alistair is pushing the water with is legs.
0:10:46 > 0:10:49CHEERING
0:10:52 > 0:10:54So, who finished faster?
0:10:54 > 0:10:58Was it arms-only swimmer or legs-only swimmer?
0:10:58 > 0:11:00The arms-only swimmer, Nina.
0:11:00 > 0:11:04Yes! Ruaridh, the arms only swimmer, was faster and that's because
0:11:04 > 0:11:08in the front crawl, our arms move us much more than our legs do.
0:11:08 > 0:11:12So, for breaststroke, the legs are important.
0:11:12 > 0:11:15Because froggy legs move as quickly.
0:11:15 > 0:11:19And in front crawl, most movement comes from the arms.
0:11:19 > 0:11:21Well remembered, Neurons.
0:11:21 > 0:11:26And thank you to our brilliant swimmers. Thanks, guys, bye!
0:11:26 > 0:11:30The great thing about swimming is that bodies of all shapes
0:11:30 > 0:11:33and sizes can move quickly through the water.
0:11:33 > 0:11:36We can use the swimming stroke that suits our body.
0:11:38 > 0:11:40These are paralympic swimmers.
0:11:40 > 0:11:44They've found the best way to use their arms and legs to move
0:11:44 > 0:11:46as fast as they can.
0:11:46 > 0:11:48Those swimmers are amazing.
0:11:48 > 0:11:52Yes, Luke. Swimming is a brilliant sport for everyone.
0:11:57 > 0:11:59So, your question was, "How do we swim?"
0:11:59 > 0:12:01And I think we've answered it.
0:12:01 > 0:12:05Swimmers move their arms and legs in different ways.
0:12:05 > 0:12:09For some strokes, our legs push us through the water.
0:12:09 > 0:12:13And for others, our arms and hands pull us through.
0:12:13 > 0:12:18And once you've found YOUR favourite stroke, swimming is brilliant fun!
0:12:18 > 0:12:21So, I hope that's answered your question.
0:12:21 > 0:12:25- BOTH: Thanks, Nina. Bye! - You're welcome. Bye.
0:12:27 > 0:12:31If you want to know more about the science that's all around us,
0:12:31 > 0:12:35go to the Nina section of the CBeebies website. Have fun!
0:12:35 > 0:12:39ALL: On your marks, get set, go!
0:12:39 > 0:12:43# Get sporty, do-be do-be doop doop do-be do-do
0:12:43 > 0:12:47# Get sporty, do-be do-be doop doop do-be do-do
0:12:47 > 0:12:51# If you're itching for some exercise from your head down to your toes
0:12:51 > 0:12:52# Toes!
0:12:52 > 0:12:55# Why not try out something new and give it a real go
0:12:55 > 0:12:56# Go!
0:12:56 > 0:13:00- # Whenever you are restless and feeling kind of bored- Bored!
0:13:00 > 0:13:07# Grab your friends and go outside and try a brand-new sport
0:13:07 > 0:13:11# Get sporty, do-be do-be doop doop do-be do-do
0:13:11 > 0:13:16# Get sporty, do-be do-be doop doop do-be do-do
0:13:16 > 0:13:20# Spinning, throwing, running, jumping, lots of fun to do
0:13:20 > 0:13:24- # Cycling, diving, sliding, rolling, It's really up to you- Yoo-hoo!
0:13:24 > 0:13:28# If you're wondering how a swimmer swims or a bike can go so fast
0:13:28 > 0:13:35# Give it a bash and make it last, it's time to go get sporty
0:13:35 > 0:13:39# Get sporty, do-be do-be doop doop do-be do-do
0:13:39 > 0:13:44# Get sporty, do-be do-be doop doop do-be do-do
0:13:44 > 0:13:48# Get sporty, do-be do-be doop doop do-be do-do
0:13:48 > 0:13:51# Get sporty, do-be do-be doop doop do-be do-do. #
0:13:51 > 0:13:55And remember, whether it's inside, outside,
0:13:55 > 0:13:59on a bike or in a pool, we can all try something new and get sporty.
0:13:59 > 0:14:01See you again soon! Bye!
0:14:01 > 0:14:05- ALL: Bye!- Get sporty!