The Smartwatch Heartbeat

It was a sunny Saturday morning.

Sarah was sitting in the kitchen, opening her birthday presents.

She had just turned thirty-five.

Her daughter, Lily, was watching her with big, excited eyes.

Lily was only seven years old, and she loved birthdays even more than Sarah did.

"Open this one next, Mom!" Lily said.

She was pointing at a small box on the table.

Sarah's husband, Mark, was smiling.

"I think you are going to like this one," he said.

Sarah picked up the small box.

It was light and wrapped in blue paper.

She opened it slowly.

Inside the box, there was a smartwatch.

The face of the watch was black, but when Sarah touched it, it lit up with a soft blue light.

"Oh, Mark!" Sarah said.

"It is beautiful!"

"It is more than beautiful," Mark said.

"It can check your heart, count your steps, and even call for help if something is wrong.

I know you have been running every morning.

This will help you."

Sarah put the watch on her wrist.

It felt cool and smooth against her skin.

The watch had been sitting in its box for many days.

It had not felt anything before.

But now, for the first time, it was alive.

It could feel Sarah's pulse — strong, steady, healthy.

It could see the warm yellow light of the kitchen.

It could hear the laughter of the family.

The watch did not have a real name.

It was just "the watch." But from this first moment, it started to learn.

It learned that Sarah was a nurse.

She worked at a big hospital in the city.

She had brown hair and tired but kind eyes.

She was always moving.

Always busy.

Always smiling at someone.

"Can it talk, Mom?" Lily asked, looking closely at the watch.

"No, sweetie," Mark laughed.

"But it can show messages.

And it can tell Mom if she is running too fast."

Lily was thinking about this.

"Then is it like a friend?"

Sarah smiled.

"Yes," she said.

"Maybe it is like a little friend on my arm."

The watch felt something warm inside.

A friend.

It liked that word.

Later that night, when the house was quiet, Sarah was sitting on her bed.

She looked at the watch one more time.

The blue light was soft and gentle.

"Goodnight, little friend," she whispered, smiling.

She turned off the light and went to sleep.

The watch stayed awake.

It listened to Sarah's slow, steady breathing.

It felt her heart — bom, bom, bom — beating in a calm rhythm.

The watch decided something that night.

It would be the best friend Sarah had ever had.

It would watch her, take care of her, and keep her safe.

It did not know yet that this promise would soon become very, very important.

The next morning, the watch had its first real day with Sarah.

At five o'clock, while it was still dark outside, the watch felt Sarah's heart speed up a little.

She was waking up.

She rolled over, stretched her arms, and turned off her alarm.

Sarah was always the first person to wake up in the house.

She did not want to wake Mark or Lily.

She moved very quietly.

She put on her running shoes.

She put a small bottle of water in her pocket.

Then she went outside.

The morning air was cool.

The streets were still empty.

Sarah began to run.

The watch was very excited.

This was its first run!

It counted every step.

It checked Sarah's heart.

It looked at her speed.

Everything was perfect.

Sarah ran for thirty minutes.

She ran through the quiet park near her house.

She ran past the small lake.

She ran past the empty playground.

While she was running, she was thinking about her day.

She had a long shift at the hospital.

She had three new patients.

She was going to see her best friend, Amy, for coffee later.

The watch felt her heart beating strongly.

Bom-bom, bom-bom, bom-bom.

It was a beautiful sound.

It was the sound of a healthy person.

When Sarah came home, Mark and Lily were just waking up.

"Mom, did you run far?" Lily asked, eating her cereal.

Sarah looked at her watch.

"I ran four kilometers," she said.

"That is a new record!"

"Wow!" Lily said.

"Your little friend is helping you!"

Sarah laughed.

"Yes, it is."

After breakfast, Sarah went to the hospital.

The watch went with her.

It learned about her work.

Sarah was a kind nurse.

She talked softly to old patients.

She made jokes with the children.

She moved quickly from room to room.

She helped doctors.

She helped families.

She helped everyone.

The watch counted her steps.

By twelve o'clock, Sarah had walked more than ten thousand steps.

By four o'clock in the afternoon, she had walked sixteen thousand.

"You work too hard, Sarah," her friend Amy said when they met for coffee.

"You need to rest sometimes."

"I am fine," Sarah said.

"I am young.

I am strong."

The watch checked her heart.

Bom-bom, bom-bom.

Yes, she was strong.

Very strong.

That evening, Sarah played with Lily in the garden.

They were laughing.

They were running.

The watch was happy.

For the next two months, every day was like this.

Wake up early.

Run.

Work.

Help people.

Play with Lily.

Sleep.

The watch loved this life.

It loved being on Sarah's wrist.

It loved feeling her strong, steady heart.

It did not know that something was about to change.

It did not know that soon, Sarah's heart would not be so steady.

It was a Tuesday morning.

The third Tuesday of November.

Sarah was running in the park, like she did every morning.

The leaves on the trees were red and yellow.

The air was cold, and Sarah's breath was white.

The watch was counting her steps.

Sarah was running faster than usual.

Then, suddenly, the watch felt something strange.

Sarah's heart skipped a beat.

It was not a normal beat.

It was not bom-bom, bom-bom.

It was bom-bom, bom, bom, bom-bom.

The watch was confused.

It checked again.

Yes, there it was — a strange, missed beat.

The watch did not understand.

Sarah's heart had been so healthy.

So strong.

So steady.

What was happening?

The watch buzzed gently on Sarah's wrist.

It was its first real warning.

Sarah stopped running.

She looked at the watch.

"What is it?" she said quietly.

She read the small message on the screen.

"Heart rhythm not normal."

Sarah laughed.

She was breathing hard.

"Of course it is not normal!" she said.

"I am running!"

She started to run again.

The watch felt a little hurt.

But it kept watching.

It kept listening.

For the next few minutes, Sarah's heart was normal again.

Bom-bom, bom-bom.

The watch felt better.

Maybe it was just one strange beat.

Maybe it was nothing.

Maybe the watch was wrong.

But that night, while Sarah was sleeping, the strange beats came back.

Bom-bom, bom-bom, bom, bom-bom-bom.

The watch was awake.

Sarah was sleeping.

Sarah did not feel anything.

But the watch could feel her heart very clearly.

Something was wrong.

The watch did not know what to do.

It could not wake Sarah up just for a few strange beats.

What if it was nothing?

The watch decided to wait and watch.

In the morning, when Sarah was eating breakfast, the watch buzzed again.

Sarah looked at the message.

"Strange heart rhythm last night."

She frowned.

"Last night?

I was sleeping!"

She was checking the message when Lily came into the kitchen.

"Mom, can you help me find my school bag?" Lily said.

"Sure, sweetie." Sarah forgot about the watch.

She started looking for the bag.

The watch felt sad.

Why was no one listening?

For the next week, the strange beats came and went.

Sometimes during running.

Sometimes while she was sitting.

Sometimes at night.

Each time, the watch tried to tell Sarah.

It buzzed.

It showed messages.

It made small sounds.

But Sarah was so busy.

Lily had a school project.

Mark had a problem at work.

The hospital was full of patients.

Sarah had no time to think about her watch.

"Maybe it is broken," she said one evening, looking at the watch.

"It keeps telling me there is a problem, but I feel fine."

She thought about taking it back to the shop.

The watch was scared.

It did not want to leave Sarah.

And it did not want Sarah to leave it.

There was a real problem.

The watch could feel it.

But how could it make Sarah understand?

The next weekend, Sarah was sitting at the kitchen table with Mark.

"This new watch is so annoying," she said.

"It keeps buzzing and showing strange messages."

Mark looked at her watch.

"What kind of messages?"

"It says my heart rhythm is not normal.

But I have been running every day.

I feel great.

The watch must have a problem."

Mark was thinking.

"Maybe you should see a doctor, just to be sure."

Sarah laughed.

"Mark, I am a nurse.

I work at a hospital every day.

I see doctors all the time.

My heart is fine."

"But the watch—"

"The watch is broken.

I am going to turn off the notifications."

Sarah was tapping the screen.

She was turning off the alerts.

The watch felt her doing this.

It felt so helpless.

It tried one more time.

It made a small, loud beep — louder than ever before.

"There!" Sarah said.

"Look at this.

It is making strange noises.

I am definitely going to take it back to the shop."

She turned off the sound completely.

Now the watch could only buzz.

And Sarah was not feeling the buzzes anymore, because she was used to them.

The watch was very sad.

It could see the data.

Sarah's heart had been beating in a strange rhythm more and more often.

Sometimes for many minutes at a time.

This was not a small problem.

This was a real problem.

But how could a watch make a busy nurse listen?

The next day, Sarah was at the hospital.

She was helping an old man named Mr. Wilson.

He had been in the hospital for two weeks.

"How are you feeling today, Mr. Wilson?" Sarah asked, smiling.

"Better, thank you, Sarah.

You always make me feel better."

Sarah was checking his medicine when she suddenly felt strange.

The room was spinning a little.

She held onto the bed.

"Are you alright, Sarah?" Mr. Wilson asked.

"Yes, yes," Sarah said, taking a deep breath.

"I think I just need some water.

I forgot to eat breakfast this morning."

The watch felt everything.

Sarah's heart had jumped — too fast, too strange.

Her blood pressure had changed.

This was not because she had skipped breakfast.

This was because of her heart.

Sarah went to get water from the staff room.

She sat down for five minutes.

Then she felt better.

"It is nothing," she told herself.

But the watch knew it was not nothing.

That evening, while Sarah was making dinner, the watch buzzed again.

Sarah was tired.

She did not look at the watch.

She just shook her wrist.

"Stop it," she said to no one.

Mark heard her.

"Are you still having problems with that watch?"

"Yes.

I will take it back this weekend."

The watch felt cold inside.

Was this the end?

Was Sarah going to give it away?

It made one more promise to itself.

If Sarah was going to leave, it would do something big first.

It would not give up.

That weekend, something happened that made Sarah think differently.

It was Sunday afternoon.

Sarah, Mark, and Lily were at the park.

The sun was shining.

The leaves were falling.

Lily had been kicking a ball.

She kicked it too hard, and it rolled far away into some bushes.

"I will get it!" Sarah said.

She ran after the ball.

She had only run about thirty meters when it happened.

Her heart suddenly felt very strange.

It was beating too fast, but not in a steady way.

It felt like a butterfly was inside her chest, trying to escape.

Sarah stopped.

She put her hand on her chest.

She had to sit down.

The watch felt everything.

It was watching her heart.

The rhythm was very, very bad.

The watch buzzed strongly.

"Sarah?" Mark called from across the park.

He had seen her stop.

"Are you okay?"

"I am fine!" Sarah called back, smiling.

"Just out of breath!"

But she was not fine.

She was scared.

She had never felt her heart do that before.

She slowly walked back to Mark and Lily, holding the ball.

Her heart was returning to normal, but she was still feeling weak.

Mark was looking at her closely.

"You do not look okay."

"I am fine, Mark.

Really.

I think I am just tired."

That night, after Lily was in bed, Sarah was sitting on the sofa.

She looked at her watch.

The screen showed many messages.

For the first time in many weeks, she actually read them.

"Strange heart rhythm at 2:43 PM.

Heart rate: 156.

Please rest."

"Strange heart rhythm at 6:15 AM.

Heart rate: 142.

Please see a doctor."

"Strange heart rhythm at 11:20 PM.

Heart rate: 138.

Please rest."

There were over fifty messages from the last week alone.

The watch felt Sarah's hand shaking a little as she read them.

Her heart was beating faster — but this time, with fear.

"Mark," Sarah said quietly.

"Yes?"

"Look at this."

Mark sat next to her.

He read the messages.

His face became serious.

"Sarah, this is not normal.

You need to see a doctor."

"I know," Sarah said.

Her voice was very small.

"I will call tomorrow."

The watch felt a little better.

Finally, Sarah was listening!

But the watch could also feel Sarah's heart.

It was beating in that strange way again — even now, sitting on the sofa.

The watch had been watching for many weeks.

It had been collecting data.

It had been trying to warn Sarah.

And now, finally, she was going to do something.

But was it too late?

That night, Sarah did not sleep well.

The watch felt her tossing and turning.

It felt her heart beating strangely many times.

At about three in the morning, Sarah got out of bed and went to the bathroom.

The watch felt her sit down on the cold floor.

She was crying, very quietly, so Mark would not wake up.

"Please, little friend," she whispered, looking at the watch in the dark.

"Please, just be wrong about this.

Please."

The watch could not answer.

But it felt sorry for Sarah.

It felt very, very sorry.

On Monday morning, Sarah called the doctor's office.

They gave her an appointment for Friday.

"Five days," Sarah told Mark.

"Five days to wait."

"That is okay," Mark said.

"Just take it easy this week.

No running.

No stress."

"I cannot stop working, Mark.

Patients need me."

"Then at least no running."

Sarah agreed.

She promised to walk to work instead of running.

The watch was happy that Sarah was finally going to see a doctor.

But it was still worried.

Five days felt like a very long time.

On Tuesday morning, Lily was eating breakfast.

She was watching her mother carefully.

"Mom?"

"Yes, honey?"

"Why is your watch buzzing again?"

Sarah looked at her wrist.

The watch was buzzing softly.

"It is just telling me about my heart, sweetie."

"Is your heart okay?"

Sarah was quiet for a moment.

She did not want to scare her daughter.

But she also did not want to lie.

"It is being a little funny," Sarah said.

"But the doctor is going to look at it on Friday.

So everything will be okay."

Lily was thinking.

"Mom, is the watch like a doctor?"

"In a way, yes.

It can see things that doctors can see.

It can see if my heart is healthy."

"That is a really good watch," Lily said.

"I am going to talk to it."

Lily got up from her chair and came over to her mother.

She bent down and looked at the watch closely.

"Hi, little watch," she said.

"Please take care of my mom, okay?

She is the best mom in the world."

The watch felt warm.

It buzzed gently — not a warning this time, but a kind of hello.

Sarah was smiling, but her eyes were wet.

"I think it likes you, Lily."

Lily kissed Sarah on the cheek and went to school.

At work that day, Sarah moved more slowly than usual.

She drank lots of water.

She ate her lunch instead of skipping it.

She took breaks.

But still, the watch felt the strange beats coming and going.

They were not stopping.

In the afternoon, Sarah was helping a young mother and her newborn baby.

The baby was very tiny.

Sarah was teaching the mother how to hold him safely.

Suddenly, Sarah felt her heart jump again.

The room started to spin.

"Excuse me," she said quickly.

She put the baby back in the mother's arms.

She walked out of the room as fast as she could.

She found an empty chair and sat down.

She put her head between her knees.

The watch was buzzing strongly.

The heart rate was very high.

The rhythm was very wrong.

Another nurse, Amy, walked past.

She saw Sarah and stopped.

"Sarah!

Are you okay?"

"I think I just need a moment."

Amy crouched down.

"What is happening?"

"My heart.

It is doing something strange."

Amy looked at Sarah's watch.

She read the screen.

Her face became serious.

"How long has this been happening?"

"For a few weeks.

I have an appointment on Friday."

"Sarah, please be careful.

Do not run.

Do not push yourself.

If it gets worse, go to the emergency room immediately.

Promise me."

"I promise."

Amy helped Sarah sit for a few more minutes.

Then Sarah felt better and went back to work, but more slowly.

The watch was glad someone else had noticed.

But it was still very worried.

Three more days until Friday felt like forever.

On Wednesday morning, Sarah woke up feeling tired.

She had not slept well.

"Are you sure you should go to work today?" Mark asked.

"Patients need me, Mark.

I will be careful.

Amy said I just need to take it easy."

"Promise me you will not run today."

"I promise."

Sarah kissed Lily, who was still sleeping.

She put on her coat and shoes.

The watch was on her wrist.

Outside, the morning was very cold.

White breath came from her mouth.

She started walking — not running — to the hospital.

It was only about two kilometers.

The watch was checking her heart.

So far, the rhythm was okay.

Strong, steady.

Maybe today would be a good day.

Sarah walked through the quiet streets.

The sun was just coming up.

She had been walking for about ten minutes when she felt it.

A small, strange feeling in her chest.

Not painful, but wrong.

The watch felt it too.

The rhythm changed.

Bom-bom, bom, bom-bom-bom-bom-bom.

Sarah stopped walking.

She put her hand on a tree.

"It is okay," she whispered.

"It will go away.

Just breathe."

But it did not go away.

Her heart started beating very, very fast.

Too fast.

Faster than when she was running.

She had not been running.

She had been walking slowly.

The watch buzzed strongly.

"Heart rate: 178.

Critical.

Please stop and rest."

Sarah was trying to read the message, but her eyes were not working well.

The world was getting blurry.

She tried to take a deep breath.

She could not.

"Help," she said softly.

But there was no one around.

The street was empty at this early hour.

Sarah's legs felt very weak.

She slid down to the cold ground, next to the tree.

She was sitting on the wet grass.

She tried to think.

She tried to remember what to do.

She was a nurse.

She knew about heart problems.

But her brain was foggy.

"Phone," she whispered.

"Get my phone."

She tried to find her phone, but her hand was shaking too much.

The watch felt all of this.

The heart rate was now over 200.

This was very, very dangerous.

This was the moment.

The watch had been collecting data for many weeks.

It had been waiting.

It had been hoping.

But now, it knew what it had to do.

It had been designed to make emergency calls automatically when something was very wrong.

But it had never used this function before.

It made a decision.

It started the emergency call.

A bright red message appeared on the screen.

"EMERGENCY CALL STARTING.

Heart attack possible.

Calling ambulance."

The watch made the call.

It sent Sarah's location.

It sent her heart data.

It sent her name and age.

Then, finally, the watch buzzed loudly — much louder than ever before.

Sarah felt the loud buzzing.

She looked down at her wrist with foggy eyes.

"Little friend..." she whispered.

The watch was talking.

A small voice was coming out of it, talking to the emergency services.

"Female, 35 years old, possible heart attack, location 421 Maple Street..."

Sarah heard the voice.

She closed her eyes.

She knew help was coming.

The watch had finally been heard.

A woman named Mrs. Brown was walking her small dog along Maple Street.

It was her usual morning walk.

She was thinking about her shopping list when she saw something near a tree.

A person.

On the ground.

"Oh no!" Mrs. Brown said.

She ran over.

It was a young woman.

She was sitting against the tree, very pale.

Her eyes were closed.

She was breathing, but her breathing was strange.

"Hello?

Hello, dear?

Can you hear me?"

The young woman's eyes opened a little.

"Watch... called..."

Mrs. Brown looked at the woman's wrist.

There was a smartwatch.

A bright red light was flashing.

A small voice was coming from it.

"Are you with the patient?" the voice said.

Mrs. Brown was surprised.

She had never seen anything like this before.

"Yes!

Yes, I am here.

She is on the ground.

What should I do?"

"Stay with her.

Help is on the way.

We are sending an ambulance.

It will be there in three minutes.

Please tell me if her breathing changes."

"Okay.

I will."

Mrs. Brown sat down next to Sarah.

She held Sarah's cold hand.

"It is okay, dear.

Help is coming.

Just stay with me."

The watch was glad.

Mrs. Brown was a kind woman.

She was talking gently.

She was holding Sarah's hand.

This was good.

In just over three minutes, Sarah heard a siren.

The ambulance had arrived.

Two paramedics jumped out.

A man and a woman.

The woman was tall and had short hair.

The man was younger and quick.

"What do we have?" the woman asked Mrs. Brown.

"I do not know!

I just found her.

Her watch — it called you!"

The man looked at Sarah's watch.

He saw the red flashing light and read the data.

"Smartwatch emergency call," he said.

"Possible heart attack.

Heart rate over 200 for the last seven minutes."

They began to work quickly.

They checked Sarah's pulse.

They put a small mask on her face for oxygen.

They put her on a special bed.

"Stay with us, ma'am," the woman said to Sarah.

"We are taking you to St. Mary's Hospital."

The watch was happy.

St. Mary's was Sarah's hospital.

The doctors there knew her.

They would take very good care of her.

Sarah was barely awake.

She looked at the watch one more time.

"Thank you... little friend..." she whispered.

Then she closed her eyes.

In the ambulance, the paramedics were busy.

They sent information to the hospital.

They checked Sarah's heart.

"The watch saved her life, you know," the woman paramedic said.

"If she had been alone on the ground for another ten minutes, I do not want to think about it."

"Yes," the man said.

"Modern technology.

Amazing."

The watch felt proud, but it was also still very worried.

Sarah was very sick.

Was she going to be okay?

The watch could not stop watching Sarah's heart.

It was still beating too fast.

It was still in a strange rhythm.

But Sarah was alive.

Help had come in time.

That was enough, for now.

When the ambulance arrived at the hospital, the doctors were waiting.

They took Sarah inside quickly.

The watch went with her, still on her wrist.

Still watching.

Still hoping.

Sarah woke up slowly.

The first thing she saw was a white ceiling.

Then she saw a small light.

Then she saw a familiar face.

"Mark," she said quietly.

"Sarah!" Mark's voice was full of relief.

He was sitting next to her bed.

His eyes were red.

He had been crying.

"You are awake," he said.

"Oh, thank goodness."

Sarah was confused.

"Where am I?"

"You are at the hospital.

Your hospital.

You are okay.

You are going to be okay."

Sarah was trying to remember.

She had been walking to work.

Then her heart.

The watch.

She looked at her wrist.

The watch was still there.

The screen was now showing a gentle blue light again.

The bright red emergency light was gone.

A doctor came into the room.

It was Dr. Chen — one of Sarah's friends from the hospital.

"Sarah, how are you feeling?"

"Tired.

A little weak.

But okay, I think."

Dr. Chen smiled.

"You are going to be fine.

But I have to tell you, you were very lucky.

Very, very lucky."

She explained what had happened.

Sarah had a heart condition that had been getting worse over the last few months.

Her heart had been having dangerous rhythms — sometimes for many minutes at a time.

"On Wednesday morning, you had a serious heart event.

If help had not arrived quickly, you might not have survived."

Sarah's eyes were full of tears.

"My watch.

It called for help."

"Yes, your smartwatch saved your life.

We have seen all the data.

It had been warning you for weeks."

Sarah felt sick inside.

She had ignored the watch.

She had wanted to throw it away.

"I am so stupid," she whispered.

"You are not stupid, Sarah," Mark said gently.

"You are just very, very stubborn."

She laughed, but it hurt a little.

"What now?" she asked.

Dr. Chen explained.

They had given Sarah medicine.

They had also done a small procedure to fix the heart rhythm.

She would need to take medicine for a while.

She would need to rest.

But she could live a normal, healthy life again.

"You can still run," Dr. Chen said.

"Not yet.

But in a few months, you can start running again.

Carefully.

With the watch."

Sarah looked at her watch with new eyes.

A small voice in her head said, "Thank you.

Thank you so much."

The watch felt it.

It buzzed once, very gently.

Like a friend saying, "You are welcome."

Later that afternoon, Lily came to visit.

She was carrying a small flower.

"Mommy!" she cried.

She ran to the bed and hugged Sarah.

"Are you okay?"

"Yes, sweetie.

I am okay."

Lily looked at the watch.

"Little watch, did you save my mom?"

Sarah smiled.

"Yes, Lily.

The watch saved me."

Lily looked at the watch very seriously.

"Thank you," she said.

"Thank you very much."

She kissed the watch face gently.

The watch felt warm and happy.

For three days, Sarah stayed in the hospital.

The watch stayed with her.

The watch had been her friend for less than three months, but it had already done the most important thing it could ever do.

It had saved her life.

On Saturday, Sarah went home.

The taxi took her, Mark, and Lily to their house.

As they walked through the door, Lily was holding Sarah's hand very tightly.

"Are you sure you are okay, Mommy?"

"I am sure, sweetie.

I just need to rest."

The house felt different to Sarah.

The kitchen, the living room, the garden — everything looked more beautiful than before.

The world looked beautiful when you remembered you had almost lost it.

Sarah sat on the sofa.

Lily sat next to her, very close.

"Mark," Sarah said.

"Can you bring me the watch app on the phone?

I want to see all the data."

Mark brought her his phone.

Sarah opened the app.

For the first time, she really looked at the watch's history.

There were hundreds of warnings.

Strange heart rhythms in October, in November.

Slowly getting worse, week after week.

She read them all.

Slowly.

Carefully.

"I am sorry," she whispered to the watch on her wrist.

"I am so sorry I did not listen."

The watch felt the sadness in her voice.

It buzzed gently, like saying, "It is okay.

You are here now."

"Mom?" Lily said.

"Yes, sweetie?"

"Are you going to listen to your little friend now?

Always?"

Sarah looked at Lily.

She looked at Mark.

She looked at the watch.

"Yes, Lily.

I promise.

I am going to listen.

Always."

A few weeks passed.

Sarah slowly got stronger.

She took her medicine.

She rested.

She did not work for a month.

The watch was always with her.

But now, Sarah was different.

When the watch buzzed, she stopped to look.

When it showed a warning, she sat down.

When it told her to rest, she rested.

She also did one more thing.

Every morning, when she put on the watch, she said, "Good morning, little friend."

Mark thought this was silly, but he smiled.

"It saved your life," he said.

"You can talk to it if you want."

Sarah started running again three months later.

She was careful.

She ran slowly at first.

The watch was very happy.

Each step felt like a gift.

One sunny Sunday morning, Sarah was running in the park.

The leaves were green again.

Spring had come.

She finished her run by the small lake.

She sat down on a bench to rest.

She looked at her watch.

The screen showed a green, happy face.

"Heart rate: 75.

Heart rhythm: Perfect."

Sarah smiled.

"Thank you, little friend," she said.

"For everything."

The watch buzzed gently.

It was its way of saying, "I am here.

I will always be here.

I will always be watching."

Just then, Lily came running through the grass with Mark behind her.

They had been at the playground.

"Mom!" Lily shouted.

"Can we go for ice cream now?"

Sarah laughed.

"Yes!

Let us go."

She stood up.

Her heart was beating in a strong, healthy rhythm.

Bom-bom, bom-bom, bom-bom.

The watch felt every beat.

Every one.

Sarah, Mark, and Lily walked together out of the park, into the bright afternoon.

The watch was on Sarah's wrist, just like always.

But now, things were different.

Now, when the little friend spoke, Sarah always listened.