“Welcome to Northside training center; I’m Bill Bartel, one of the coaches here at the facility and let me just say, we are so happy that you’re able to join us for a few weeks of training”

Noelle Peterson smiled and shook the coaches hand as she came through the door with a giant duffel bag slung over her shoulder “I’m so happy that you invited me” she replied.

“You’re the junior national champion at the 200 and 400 meter freestyle and you’re only 12; you bet we want to get to know you here. I have a feeling you could be training with us for quite a while as we prepare you for multiple Olympic Games”

Noelle blushed hard and shook her head “I don’t know about that”

“No; you’re very young and very raw but one of the things we do here is develop that raw talent into poise and medals. At 12 you haven’t even scratched the surface of your potential yet; I think these next few weeks will be the most awesome experience of your life Noelle” Coach Bill told her.

He put his hand on her back to show her which hallway to head down. As they walked, they passed by the first pool “Oh My Gosh is that Finley Marshall?!” Noelle asked stopping dead in her tracks.

Coach Bill smiled and nodded “It sure is; she trains here” he pointed to the tall 22 year old.

“Oh my Gosh can I meet her? She’s my favorite swimmer! She just won gold!” Noelle gushed.

“Not only will you get a chance to meet her; you’re going to train with her”

Noelle’s jaw dropped and her eyes beamed “No way!”

Coach Bill nodded and smiled.

“No…WAY!” Noelle repeated.

“Way” Coach Bill told her. “She’s looking forward to swimming with you later today in fact”

“Finley Marshall knows who I am?!” Noelle said in shock.

“She sure does; she is super nice. The interviews you see on TV are really her…she’s one of the nicest yet competitive people here”

“I would do anything to swim like her; to have her kick…her power; she’s so strong coming off the wall” Noelle said still staring at her idol as she walked to the far side of the pool drying off her long curly brown hair.

“You train with her; with us…and you will have that kind of power and speed: I guarantee it” Coach Bill told her.

“Wow” Noelle said as they began to walk again “I can’t believe it…this is like a dream come true”

“Just wait until you swim with her” Bill told the still beaming girl.

Noelle got to her dorm room and dropped off her stuff and got changed into some swim gear. She put on a black and pink Speedo one piece; it wasn’t the full race gear that covered her thighs but it was still racing gear and since she saw Finley had on a blue one just like it, it was her choice.

She grabbed two swim caps and her goggles and headed to the pool as nervous as she had ever been.

Finley Marshall was resting between swims. She had her phone out as she sat in a cheap white plastic chair slowly drying off in the warm air that hung around the entire facility. She drummed her big bare size 13 feet up and down as she did.

She looked up and saw a young girl standing with Coach Bill and knew it must be the new arrival. Finley got up and flipped her almost dry curly brown hair back off her shoulders and headed over with a wide and friendly smile on her face.

“You must be Noelle! I’m so happy to meet you!” Finley said as she approached.

Noelle felt faint “Oh My Gosh; Finley…you’re my favorite swimmer…I, I can’t even”

“Oh” Finley bounced over the last few steps and gave Noelle a big bear hug “We’re teammates now girl, welcome to Northside!” Finley towered over Noelle but Finley towered over most people at 6 feet tall even though Noelle was tall for a 12 year old at 5’5”.

Noelle couldn’t speak when Finley told her “You earned the right to be here and never think you don’t belong: Those records up there will have your name on them one day…I expect you to break every one of mine”

“I don’t know what to say” Noelle replied shaking from joy and excitement.

“Say that you’re ready to get into the pool with me. I want to swim against you and see what you’ve got” Finley said still smiling. “But you need to do some warm up laps first…hop in and then I’ll join you”

Noelle put her straight blonde hair up, tucking it under a swim cap and got her goggles ready while Finley and Coach Bill talked off to the side. She dove in and began to swim her usual routine of warm ups.

After a few laps, she climbed out and saw Finley tucking her hair up under a cap and stretching out her long arms. She wind milled her arms around and shook out her broad shoulders “You ready?” she asked.

Noelle nodded “I wish I could swim faster than her today” she thought “Just to show her what I can do; what I wouldn’t give to just keep up with her let alone finish before her”

“I’m not going to go full out today but I’m also not going to take it easy on you; I want to see what you’ve got” Finley said. “I watched your stroke on your warm ups and you’ve got the technique down; the only place I’ve got you is in size and experience and I would trade those some days for a little bit of your youthful energy” Finley added with a smile.

“Well I’d trade all that youth for just a bit of your power and size and experience” Noelle responded stepping up onto the block.

Finley laughed and curled her long right toes over the very end of the block as she perched her left foot back ready to explode into the water. “We’ll see in the end if youth or size wins”

Noelle took her ready stance bending forward and putting her fingers on the block now too “We’ll see” she thought “now If only I could be your age and you could be mine”

Finley shouted “GO!” and both swimmers sprang forth driving their diving bodies into the water, propelling themselves forward with powerful dolphin kicks underwater.

Noelle broke the water first and sucked in a deep breath digging forward and feeling strong and motivated. Finley hadn’t come up and Noelle could see her outline already ahead of her rising toward the surface before finally breaking through.

Finley came out and took in her first breath but she felt off her game. She was questioning her kick; it didn’t feel as powerful to her this time even though she saw she was a full body length ahead of Noelle. She dipped her head to the left as her right arm broke through the water stretching out and splashing down and driving through the water. As it did, it shrank from shoulder to fingertip losing a full inch in length while the muscles trimmed and lost tone in a very slight way.

But when Finley brought her left arm out to stroke, it too shrank and lost tone throwing Finley’s stroke and rhythm off immediately. She was alternating her kicks but as her size 13 feet kicked like a rudder through the water, they too began to shrink smaller.

Her legs began to lose size and power with each and every kick. Her thighs thinned and trimmed as her legs shrank. Her core muscles and back weakened as Noelle’s last wish began to come true. Finley was getting younger and as she did, she lost more power, size and experience with every stroke.

“What is wrong with my body today?” she questioned herself as she dug deep “I feel off, I should stop” she thought. But as she did, she saw something out of the corner of her eye; Noelle’s hands splashing down and churning up the water closing in on her heels.

“No way I’m stopping; no way she gets past me. You’ve down this a million times Fin…just because you’re not feeling at the top of your game there’s no way you stop and let a 12 year old beat you” she thought with the competitive part of her brain taking control.

Her swimsuit dropped a size smaller to compensate for her diminishing body so she never realized that she had shrank down again, she felt her muscles burning in her shoulders, stomach and back.

Noelle had never felt better or stronger in the water even when she won her age division a few months back. “It must be the competition that brings out the best in me; I swear I’m actually gaining on her” she thought as she gasped in deeply and drove her body through the water like a knife.

As her right arm broke the water’s surface it grew longer and stronger; the muscles rippling and elongating with power. Even Noelle’s fingers were growing longer with each stroke closer to the wall.

She allowed herself a glance to the side and saw that she had caught up to Finley’s feet which splashed away kicking in the next lane “I’m going to catch up to her” she thought as she aged and Finley regressed.

Finley could feel Noelle gaining on her “What is wrong with me?!” she thought as she saw the wall approaching. She tucked and began her kick turn which only frustrated her more. Her feet failed to land flush against the wall, like she had come up short in her turn which to her was impossible.

“This is not happening!” her mind screamed “I did not just short my turn!” but she knew she had when only her toes grazed the surface of the wall. She failed to propel herself forward with any kind of momentum and she furiously kicked to compensate but each kick was slightly weaker than the previous one as her muscles and legs continued to shrink and weaken. Her feet were even two full sizes smaller.

Finley’s arms shrank, her hands and fingers shrank as her whole body compacted again taking her swimsuit down yet another size to keep up. Her lungs burned as even they were getting smaller inside a chest that was compressing back into her teen years.

Finley’s breasts were kept in close check by her racing suit but as her suit shrank, so did her breasts. They were getting smaller and smaller as she got younger trying to maintain her lead in the pool.

Noelle went into her kick turn and almost caught her now longer legs in a tangle. “I mistimed it!” she thought as she really had to tuck her legs back. She planted her wider and longer feet against the wall and pushed with all her might.

“Oh my Gosh!” she thought as she shot through the water “That was the best turn I’ve ever done!” she thought as she was going further and faster than she had ever felt herself go before. Her leg muscles continued to grow taking her thighs out wider and her hips in narrower as core muscles built up across her abdomen and stomach.

Noelle’s pink and black suit grew a size to fit her growing body and during one particularly hard stroke, her upper arm brushed against her growing breast. “I’m catching her!” she realized as her arms grew longer than Finley’s for the first time. “I’m actually catching her! I am swimming like her!”

Noelle’s fingers were now outstretched up to Finley’s chest; she had trimmed her lead down to less than half a body length. She was adjusting her body and her legs as she suddenly developed hips and her rear began to grow out larger and rounder. Her kicks were getting stronger as those muscles kicked in too.

With her face dipping in and out of the water, her goggles were growing tighter as her head and features began to grow and change. More hair was building up under her cap, threatening to pop out and pull the cap off but as her nose and mouth grow larger, it allowed her to take in more air.

Noelle’s chin came down and her cheeks rose up as her mouth and jaw worked to gulp in as much air as possible.

Under mirrored goggles whose straps need to be loosened, her eyes widened and matured.

Finley’s arms ached as she struggled to keep her lead “I can’t believe she’s catching me…what is happening? I don’t feel right; it’s like I’m swimming like I was 10 years ago again”

As she neared the wall again, she was determined to do a perfect kick turn but her mind screamed out in anger as she mistimed it again. “Where are my legs? What am I doing wrong all of a sudden?”

Her toes barely grazed the wall this time, they brushed off as a shrinking spurt hit her legs and feet just as she ducked and flipped. She got even less power and momentum this time around as her hips and ass shrank back down flat as she entered her early teens again. Her stomach and abdomen were smaller and weaker and she was getting nothing from her hips and thighs as they slimmed and shrank even more.

Her arms maintained what they could but they felt weak and ineffective to her. As she swam on, her hair thinned under her cap and water seeped in as even it felt loose. Water began to seep into her goggles which were always air tight as her face shrank.

Chlorine stung her eyes “What else could go wrong?” she thought as her eyes shrank and narrowed. Her nose slimmed and pulled in cutting her airflow as her lips thinned and her mouth shrank down smaller.

Her chin and jaw weakened as her cheeks puffed up round and chubby as she fought back tears of frustration when she saw Noelle kick past her and into the lead.

“Impossible!” Finley thought struggling to keep up now “I’m falling behind a 12 year old! 12!” she thought as her age was closing in on that number quickly.

“Impossible!” Noelle thought as she saw herself emerge ahead of her idol and a gold medal winning swimmer “There’s no way she’d let me win; I’m actually doing this!” she thought swimming even harder and faster as she continued to get stronger and older. She entered her 20’s as she tore down her lane opening up a several stroke lead.

The wall was upon her again “So soon! There’s no way I’ve done enough strokes to come this far already” she thought “But I must have because I am pulling away!” she flipped and planted her now size 11 feet against the wall and propelled herself one last time “50 more meters and I’ve beaten her!”

“NO, NO, NO, NO, NO, NO, NO, NO” another No echoed through Finley’s mind with every stroke and every kick. “She can’t beat me, she can’t beat me!” tears were flowing freely as her anger overwhelmed her.

In just a little over a minute and a half in the water, Finley’s body had regressed from that of a 6 foot tall, 22 year old adult to a 5’3” 12 year old pre-teen. Her feet were down from a size 13 to a size 7 youth. Her breasts were barely buds on her narrow chest and her skinny legs could no longer keep up the kicks. She was getting exhausted and just wanted this race to be over. She kicked and dragged herself toward the wall one last time.

Her final kick was weak but at least she managed to plant her feet. Clearly slower than Noelle, she fought to keep up. Her breathing was ragged and her hands slapped at the water as she fell further and further behind.

The ends of Finley’s now smaller hands may have been able to touch the bottoms of Noelle’s feet if they had been swimming in the same lane.

The final few meters were upon them and Noelle was cruising into the wall swimming stronger and feeling better than she had ever felt before. Every stroke drove through the water and every kick propelled her forward faster; she screamed out in exhilaration as her fingers touched the wall.

Noelle pumped her fist into the air and saw Finley still had several strokes left until she made it in. “Oh My God” she said to herself breathlessly “I won”

Finley was out of breath and exhausted when she finally hit the final wall “I…don’t…why…” she panted to herself, her head down in shame and anger and confusion. She didn’t look to the next lane over as she ripped off her cap and goggles and tossed them on the deck.

Her brown curly hair was shorter and thinner, barely coming down to the tops of her shoulders and her tiny mouth was locked in a scowl. She put her hands on the deck and pushed up to lift herself out of the pool. Her elbows shook from the effort but she lifted up quick and light and as she put her knee down to lift the rest of her body out of the water she realized “Something’s wrong”

She stood up and looked down at her body and her mouth fell open “What the?!” she said out loud. “What happened to my body?! That’s not my body! That’s not what I look like…where did my body go? I’m skinny and little!” She thought as she spun around and watched the giant form emerge from the pool in the next lane over.

Noelle was still on cloud 9. She pulled off her extremely tight swim cap and let her long blonde hair tumble half way down her back as she ran her long fingers through it, tousling out the damp locks.

Her goggles were stuck momentarily and indentations had formed as she had grown against the tight elastic straps. She swallowed and smiled a very wide and different looking smile, her big blue eyes beaming as she planted the palms of her hands on the deck and lifted herself up and out of the pool.

“Wow…I feel great” she thought as she lifted up out of the water shaking her head to dislodge some water from her ear. She put her right knee on the deck and looked down at her body “What the?!” she said as she stood up “What happened to my body?! This isn’t my body! I’m huge!” she thought as she saw the powerfully built body she now possessed.

Starting at the ground, she lifted up her toes; longer and wider as were her whole feet. Her eyes traced back and up her legs now long and thick with muscles. She put her hands on her hips and they ran back to her tight ass before leaping forward and pressing down on her firm and strong stomach.

Finley assessed her own body from the ground up as well. She lifted her shorter toes and wiggled them slightly as her eyes traced up her skinny and shorter legs which gave way to narrow hips and a flat chest.

Out of the corner of Finley’s eye; she saw Noelle’s feet and legs a few feet away and it triggered in her mind “Something’s wrong” again. She looked over and was too shocked to scream at what she saw. The small 12 year old girl who had dove into the pool next to her was nowhere to be seen; instead a large woman had emerged and now towered over her.

“But what?” she said now only coming up to Noelle’s chin.

Noelle became aware of her surroundings as she saw a much smaller girl next to her. She looked over and down at the gape jawed girl staring up at her and her mind did a double take “Finley?!” she said in shock “But you!”

Noelle’s eyes ran up and down the small girl in front of her several times trying to comprehend why it looked like a pre-teen version of her idol and then trying to comprehend why she was so much bigger than her.

Finley’s mind reeled trying to understand who was standing before her so much bigger and stronger than her; it looked like an adult version of Noelle but that was impossible but so was everything right now.

Finley reacted the only way she could; she screamed.

A high pitched scream rang out and startled Noelle so much that she screamed too but in a much deeper tone.

Finley stopped screaming but was hyperventilating “How did…you’re so…and I’m so…AAAAAAHHHHHH!” She screamed again.

Noelle had stopped screaming and she finally put her massive hands on Finley’s narrow shoulders to hold her still “Stop screaming! You have to stop screaming!”

Finley shook her head back and forth “No…this is impossible; you’re big and I’m little! How did this happen?!”

“I don’t know but somehow while we were swimming we somehow switched places. We switched ages with each other with you getting younger and me getting older” Noelle said crouching down to be at eye level with the scared and confused young girl.

“But that can’t happen; that’s impossible. How can we switch ages? I can’t be 12 again but you…you sure look like an adult now” she looked down at her body again “And I sure don’t look the same, that’s for sure” she nervously rubbed her right foot up and down her left calf.

“But that’s the only way you’d beat me by that much is if you somehow had become bigger than me and that’s why I felt so off while swimming; I was shrinking the whole time!” Finley said in her higher voice.

“I know I felt great during my swim; I’d never felt stronger” Noelle said flexing her arms

“And that’s why I kept biffing my turns! My legs were actually getting shorter and throwing me off!” Finley replied. A look of horror dawned over her face “What did I say to you before we dove in? Something about having your youthful energy”

“And I said I wanted your power and size and experience…and Ohmygod we did this to ourselves somehow! We got what we said we wanted!”

“But I didn’t mean it like this!” Finley shouted and bounced up and down on the balls of her dripping wet feet.

“Well I didn’t mean it like this either” Noelle insisted rising up to her full 5’11” height and throwing her long arms outward.

Finley focused on Noelle’s outstretched hand for some reason and it brought her eye to the wall behind her. When Finley saw what was there, her heart and her jaw dropped.

“No. That’s not right. That’s impossible!” she said and stomped off past Noelle and toward the wall.

Noelle spun towards it and gasped: Up on the wall was the list of records held by Northside members and all the top ones listed Noelle Peterson as the record holder. Finley’s name was gone; replaced by Noelle in all of her events.

As Finley stood in disbelief at the wall, Coach Bill walked in “Pretty impressive right?” he asked the small girl staring up in disbelief. He turned to Noelle and asked “So how did our newest recruit do? Do you think Finley has a future here with us at Northside?”

“Um…sure. I can see her with a gold medal around her neck already” Noelle said softly as Finley balled up her fists and screamed again much to Coach Bill’s confusion.