“Alright Claire, let’s take a break…get some water” Tracy Burns said gently patting a towel to her forehead. She had barely broken a sweat while her student, Claire Mason, was panting red faced grasping for water.

“I’m dying…” Claire said sitting down hard.

“Oh you’re so dramatic” Tracy chuckled taking a little sip of water “Besides, this is only your third session with me, don’t be so hard on yourself. You’re doing great”

“Says the skinny little super fit woman with the model perfect body” Claire said.

“I’m a personal trainer Claire, my body is like my business card. I have to show that I know what I’m doing” Tracy laughed.

“And I’m your last client of the day right?”

“Yes you are…We can head to the locker room and get cleaned up” Tracy said putting her hands on her hips. “You did great today Claire…you pushed yourself more today than the last time and that’s all I can ask. We’ll keep it up for as long as it takes”

“Thanks Tracy…it’s why I pay you haha” Claire said still toweling off her upper chest. Her shirt was drenched in sweat, her sports bra stuck to her and her workout pants were just as stuck. “I’d pay a whole lot more if I could just get a body that’s your size”

“No shortcuts like that exist Claire but if you keep it up, we’ll do our best” Tracy said.

Another woman was following them as they went into the locker room with a smirk on her face.

As Tracy and Claire emerged from the showers, wrapped in towels, the woman was waiting for them sitting on the bench in front of their lockers.

“Um Hello” Tracy said as Claire clutched her towel tightly “Can we help you?”

The woman smirked “You could but I think I can help you more”

“Um I don’t think so, so if you could please move out of the way I need to get to my locker” Tracy said in a huff.

The woman merely crossed her legs and smiled. She put her hands up and Claire and Tracy’s clothes floated out of their lockers and hung in the air before them.

Tracy’s eyes bugged and she reared back while Claire leaned forward clutching her towel, her mouth agape.

“How are you doing that?” Claire asked softly.

“Why are doing this…what do you want?” Tracy asked.

“I want to give you two an opportunity” the woman said “I couldn’t help but overhear your conversation as you two were finishing up and it piqued my curiosity. See, I have certain talents and how do I put this, I enjoy watching social experiments. And I think the phrase ‘no shortcuts’ when she referred to getting a body like yours caught my attention”

“What are you saying?” Claire said now standing her ground more firmly.

“Simply put ladies. What if I could switch your bodies…well, the size of them at least in this case?” the woman raised her eyebrows.

“I worked on my body my entire life! How dare you come in here and…” Tracy said.

“And give you the opportunity to actually put all your teaching into effect. Putting your money where your mouth is. Taking away your naturally thin genetics to give you a chance to show that what you teach can actually make a difference. You can record every second of your transformation and you would be the most sought after trainer in the world. Able to name your price. You’d be rich and powerful; fitness trainer to every star…you’re welcome” the woman said.

Tracy simply gasped.

“And for you Claire…you get your shortcut to the body you’ve always wanted. But then; the question becomes can you keep it or will you revert and short circuit yourself?” the woman tapped her chin and uncrossed her legs before standing up.

“What do you say?”

Tracy and Claire looked at each other before looking back to the woman thoughts running through their minds like crazy.

Both women knew they were the same age, 27 and the same height 5’5”. Their difference came in the form of 100 pounds. Tracy weighed 120 while Claire topped out at 220.

Their clothes still hung in the air and the woman now brought their attention to them. “So…it looks like what we have here is Claire’s dress from work” Claire’s long green and black dress floated forward. It looked huge to both of them, like a sail, and Claire blushed.

“But we also have a dress for Tracy as it looks like she was on her way to the club tonight” A very small, low cut blue dress floated forward and it was Tracy’s turn to blush as the very revealing garment swung forward.

The blue was directly in front of Tracy and the green was in front of Claire, but now the woman moved her hands together and she crossed them in an X. The dresses flew across the front of them until they had switched places and the green was directly in front of Tracy and the blue was in front of Claire.

“What is up with this? Just because you put her dress in front of me I’m supposed to do what?” Tracy said “I’m not putting it on like that…”

“And there’s absolutely no way I can put her dress on!” Claire giggled nervously while shaking her head seriously no.

“Well if size is the problem…” the woman raised her hands and snapped her fingers.

Tracy gasped while Claire asked “What are you doing? How…?”

The green dress in front of Tracy began to shrink down in size going from its original size of 20 down to a size 4. The waist tightened, the sleeves narrowed along with the shoulders as it simply became a much smaller size.

Tracy’s eyes wandered to her own dress and her jaw dropped as the fabric stretched, pulling wider as additional fabric came on as it doubled and then tripled in size, then, quadrupled from her original size 4 to an extra-large size 20 dress. The cups, originally designed to suit a woman with a B or C cup bust now enlarged to accommodate at least a double D or E cup.

Frankly, such a small and slinky dress looked absurd in its current large size.

The woman dropped her hands and their shoes came around as well. A pair of simple black flats lined up beneath the green dress while a pair of 4 inch silver stilettos went with the blue.

Claire’s chin dropped to her chest upon seeing the ridiculous heels “I have never worn a pair of heels like that in my life! I’ll break my damn ankles and my neck if you make me wear those!”

“Oh don’t worry, they’re your size now Claire” the woman said calmly “A 9 wide”

Tracy did a double take “But I only wear a 7”

“Which are the size of YOUR black flats Tracy” the woman calmly explained.

“I’m not asking for much…just put on the clothes. I’ve made them your size…what can it hurt?”

“So your social experiment is somehow changing our clothes into each other’s size?” Tracy said cynically. “So where does it come in that we switch sizes?”

“Walk a mile if you will” the woman said simply. “A change in wardrobe, a change in perspective…the changes in your bodies will happen soon enough”

“I don’t think we have much of a choice” Claire said.

“Excellent” the woman said as the clothes fluttered down and lay down on the bench.

“Do I get my own underwear?” Tracy asked as she stepped forward.

“Nope…you will get Claire’s in your size” the woman said simply as Claire blushed hard.

“Fine” Tracy said undoing her towel ”Are you just going to watch?”

“Yes…I do wish to see you two in your new outfits” the woman said. “That’s when the real fun begins” she smiled.

There was something in that smile that Tracy didn’t like.

“I can’t believe I’m actually wearing something like this” Claire said running the blue dress through her fingers. She picked up the nude colored thong panties and blushed yet again.

“Oh come on…you can’t wear a dress that tight and then have panty lines” Tracy said.

“I wouldn’t know” Claire countered.

Tracy put on the simple white briefs along with a cream colored bra in her size of 32B before slipping the dress on over her head. She pulled it on and down, adjusting the bottom hem into place before fidgeting with the sides, the spots around her breasts and the waist. She fluffed out her still somewhat wet long brown hair running her fingers through it, teasing it out.

Claire was having some difficulty in getting her dress to smooth out into place. She had it on but was tugging at it hard trying to maneuver it around her stomach and onto her thick thighs. “I feel like my whole ass is hanging out” she said shaking her head.

Claire was beet red.

“Shoes too ladies” the woman said.

Tracy merely sighed and slipped her feet into the well-worn flats that fit her feet snugly.

Claire had to sit down on the bench. She sucked in a quick breath “I can’t breathe in this thing” she hissed out as she slipped her feet into the silver stilettos. She had ankle straps to lace up, which she did as her face turned red and she began to get dizzy. Finally she sat up and wobbled to her feet.

Taking tiny baby steps she grabbed a locker door to steady herself.

“Excellent!” the mysterious woman said with a smile that made the hair on the nape of Tracy’s neck stand up.

“I don’t know how I’m supposed to even walk in these. It’ll take me all night to make it to my damn car in these” Claire grumbled still looking down at her own feet.

Her thick toes looked squished beneath the thin silver strap, her plain toenails topping off the look that was so not her own. “My feet are already starting to ache in these”

“If you would be so kind as to be quiet Claire I assure you that your problems will soon begin to lessen” the woman said.

“So exactly what happens now?” Tracy said putting her hands on her hips impatiently and tapping her foot.

“Well I’ll explain: I placed a spell upon your clothes; the sizing is only temporary. They shall soon return to their original and permanent sizes and when they do, they shall take your bodies along with them. The clothes make the woman you see” the woman cocked her right eyebrow and chuckled.

Tracy pursed her lips “So that’s the trick”

“I told you that you two would be allowed to switch weight and body types and sizes, now if you’re about done complaining…” the woman said.

“I haven’t complained as much as she has!” Tracy said defensively. Claire looked up. She recognized that in her heels she was now by far the tallest of the three women.

“Just hush” the woman said.

Her eyes moved back and forth between the two of them, then, a smile began to spread over her face. She looked quite satisfied and content.

“What? What’s up with that smirk on your face?” Tracy demanded.

The woman just shook her head slowly.

Claire felt a twinge hit her just beneath her left breast which made her jerk to the side. Her dress felt even tighter.

Tracy felt a cool gust of wind whip around her and up her dress which billowed outward.

Claire looked down again to the floor and her feet in her ridiculous shoes. In the blink of an eye, a nanosecond, she recognized things as wrong. ”What the…?!”

Claire twisted her foot and ankle inward to get a different angle. Her foot looked different. Smaller for one thing, slimmer for another. Her toes even looked flatter and she gasped as pink nail polish appeared on them.

“Oh honey…if you’re going to wear heels like that, you need to dress up those feet of yours” the woman said smirking. “But you’ll learn” she added in.

Tracy blinked while using her arms to flatten down the sides of her loose dress. Her feet slipped as her shoes suddenly jumped 2 sizes from a 7 to a 9 wide.

Her feet didn’t waste any time. She felt her toes spread apart and the balls of her feet press down. Her arches flattened and her heels dug in as her feet widened and grew larger to match the shoes she wore.

“My feet…” Tracy mumbled as she pointed her toes inward. The tips of her flats came together and as she leaned forward, she lost sight as her dress billowed outward.

Tracy felt a pinch in her abdomen and she stood up. She had to look up to Claire and both saw confusion in each other’s face.

Claire blinked comprehending that Tracy’s face was changing. Her cheeks were puffing up, her big brown eyes didn’t look as big; they looked smaller when framed by her growing chubby cheeks not to mention her rapidly forming second chin.

Tracy thought “Wow! Claire looks…good? Different…definitely different…”

Claire’s face was slimming down, her features becoming more defined and angular as opposed to puffy and round. Her pale blue eyes coming out wider and larger.

Her cheeks were losing the extra chubbiness and angular, sharp cheekbones were emerging. The whole look of her face was changing as that in turn brought out the sharpness of her long and thin nose and accentuated the slight upturn in the corners of her mouth that had been lost. Her chin and jawline smoothed out becoming defined and strong.

Tracy blanched, blinking and catching her breath as she watched Claire’s face change so dramatically. “I…I had no idea” she said somewhat breathlessly.

Claire could only blink. She had no idea what she looked like but she knew exactly how dramatic Tracy’s changes already were.

Claire’s dress was pinching her all over. It had gotten so tight that she couldn’t take in a full deep breath.

In truth, her blue dress, which had started at a size 20 had already shrunk back down to a 12. Every time it dropped a size, it took away more and more of Claire’s body fat. Just as she almost started to take a deep breath, the dress would shrink again causing her a new round of discomfort.

The pinching this time was taking place along her inner thighs and Claire was attempting to spread her legs apart but finding it quite difficult.

Her hand shot down and she noticed her fingers looking slimmer as they tried to create some breathing room between her squished thighs. She wedged her hand in but quickly brought it back out “My thighs!” she said already realizing that layer upon layer of fat had already disappeared.

Her hands returned and wrapped around her legs and squeezed the firmer and thinner legs. She straightened up and with her stomach receding noticed that she had a very good clear view of her entire feet. She clicked her heels nimbly together and allowed herself a smile.

Tracy still felt like she was never quite catching up to her dress size. It remained a loose and flapping garment even as it had increased from a size 4 to a 10. Her body was steadily putting on the weight that it would now carry but even at 150 pounds she still felt alright since her dress kept preceding her.

Tracy leaned back and placed her hands on her stomach “What the…” she said upon feeling the extra soft flesh that now sat where previously rock hard abs had resided. She began to knead it like a cat.

She turned to the woman, a look of amazed shock on her face “How are you actually doing this?”

The woman smirked and rose up on her tip toes with a look of satisfaction on her face. “You don’t need to worry yourself with that honey…just worry about yourself”

“But…but if you’re doing this then you could conceivably reverse this too” Tracy said.

“How heavens why would I want to reverse this?! That would ruin your chance to physically transform your body your way and prove all your hard work actually does payoff”

Tracy scowled as her dress and subsequently, her body continued to expand.

Underneath her dress, her bra was growing and taking what had been pert and perky breasts out bigger and now also flabbier.  A sudden jump in cup size coupled with a sudden surge of gravity caused her jaw to drop and a gasp to escape her larger body.

Tracy’s hands flew to her breasts and she squeezed them amazed at how much bigger they had grown. They were now bigger than her hands, her fat hands with thick fingers massaged and kneaded her big soft breasts. They tightness and firmness they had possessed was gone. No longer a 32B she was now closer to a 38D.

“Ah fuck” Tracy muttered. Her green dress was now up to a 16, her weight was edging north of 190 pounds and she now felt it getting tight around her waist. She shifted her weight and pulled up the hem to get a quick glimpse of her legs.

Pale white, thick thighs pockmarked with cellulite dimples greeted her “Holy shit…how is this even my body?”

Claire had a blank look on her face. She blinked and stared straight ahead now able to take deep breaths to calm herself down. Her blue dress had drastically changed and so had what she was displaying in it.

Claire’s ass had steadily tucked up, firming up and becoming tight and round in the process. Her hips slimmed down and her dress began to smooth out as it became a size 8. Her stomach was nearly flat, just a bit of softness remained and the built in cups had tightened and easily contained her 34C breasts.

Claire’s hands went to them and squeezed them shocked at how small and firm they were sitting easily inside the palms of her hands.

Claire’s thighs separated.

They had thinned and now even in her tight size 6 dress, her thighs gained full motion. Her calves were thin and showed firm and tight muscles and she dug in her heels steadying herself but moving nimbly in her silver heels.

Tracy looked up at Claire. Her eyes panned down revealing a thin and fit woman standing before her. Her eyes traced back closer and examined her own body. The green dress was ow back to a size 20. Her body was a body that needed a size 20…maybe even a 22 as her weight now topped out at 220 pounds. Her bust size was now a 40E and all she could do was let out an exhausted sigh.

Claire shivered as her dress returned to a size 4. Her body was a body that fit nicely into a size 4. 120 pounds, a 32B bust, rock hard abdominal muscles, sculpted biceps and triceps, a perfectly shaped round ass and curvaceous legs to die for. Claire’s body was model perfect and with her blonde hair and blue eyes, she was quite stunning.

”No shortcuts huh?” the woman said with a touch of contempt in her voice aimed at Tracy who suddenly took a step back trying to make herself smaller. She put her double chin down and gazed at her shoes.

“I see you two have also discovered that I switched out your confidence levels as well as your bodies…it’s only fitting to work with what you found contemptable just an hour ago Tracy. Maybe you can hire Claire here as your personal trainer” the woman laughed.

Claire stuck out her chin and chest with a light smile on her face stepping forward confidently.

“A true reversal of roles and fortunes…maybe even a reversal and swapping of your futures” the woman shrugged “That is up to you”

“But…but how…what I mean is…what’s in this for you? Will you be checking up on us?” Tracy said.

“Yes. I’ll be around. I wouldn’t miss this” the woman said before she turned on her heel and walked out.

Claire and Tracy stood there frozen and stunned.

“Uh”

“Um”

“You…”

“And uh you…”

Claire brought her hand up to her chest and tugged her dress up whereas Tracy slipped a step back subserviently.

Claire went to her locker. Her bag was there now filled with workout clothes in size small. Her purse was in there. She pulled it out going for her wallet and her driver’s license. She smirked triumphantly at the picture and numbers displayed on the laminated card “Oh honey…if you think you’re getting this body back…you are sorely mistaken”

Tracy stumbled a bit, her bottom lip quivered “But…but what did I do to deserve this? I wasn’t bad or, or mean or anything…”

“No but you never understood how hard it is for people who aren’t blessed genetically like you were. You were naturally predisposed to look like this. You and about 1% of the population can pull this off. But you thought anyone could do it and now you’re going to learn what it’s like for the other 99%” Claire said. “But I’ll tell you what…since I see that your physical trainer license has transferred over to me now. I’ll meet you here on Tuesday at 6:30 okay”

“But…” Tracy stammered. She knew she was no longer a trainer and relied entirely on her office job for income now “Where are you going?”

“Out clubbing of course! Do you really think I’m going to let this body and this outfit go to waste silly?”

Claire left deftly maneuvering on her stiletto heels.

On Tuesday night, Claire was waiting in a pair of stretch workout pants that clung to her frame and a sports bra, her blonde hair tied back in a tight ponytail by the entrance to the track.

At 6:40, the door opened.

“Hey Tracy! So glad you could make it” Claire said walking over with an enthusiastic smile.

“Yeah, um, great…” she replied.

Tracy was already turning red. She had on a pair of basketball shorts, two sports bras and a large loose gray t-shirt over the top. Her brown hair was piled atop her head in a messy knot.

“We’re going to start out walking at a nice pace to warm up and then move into a light jog” Claire said starting out.

Tracy fell a half step behind immediately. She was panting a bit just walking the first lap and could feel her heart pounding. Claire began to chat.

“So how’s things been since, well, you know…we swapped?”

“How do you think they’ve been? Pretty damn different and more difficult. I could barely breathe while bending over to tie my shoes. I got fucking dizzy just standing up in the locker room…my boobs bounce like crazy…like I’m totally chaffing already and my thighs rub together so much I think I might start a damn fire”

Claire chuckled and began to jog “I remember that…I went for a 5 mile run yesterday and I did 8 the day before that…3 the day before that because it was cardio day and last Friday I swam 30 laps before I did a 2 hour routine. I also do a full Peloton workout every morning before work”

Tracy rolled her eyes as she tried to keep up. Her feet barely lifted off the ground; she shuffled more than jogged. She made it one full lap at jogging pace before breaking off and sitting down.

Claire did 2 more laps while Tracy rested before she came over and suggested they move to the stationary bikes.

Set up next to each other Claire began to talk again “So let me say that since I inherited all your clothes, you have great taste…I love my wardrobe. I’ve been wearing these cute little skirts and tops to work. Pants…everything looks good and heels. I never wore them before so now I can’t get enough of them though I’m sure I’ll get tired of them in time”

“Yeah…<pant> you will…just…<pant> give it time” Tracy managed.

Claire just laughed easily sitting back as she pedaled even though her bike was set several levels higher than Tracy’s bike. “I know your clothes you have to wear aren’t as fashionable but they’re sturdy and good quality. Once again, I’m sure you’re finding out how limited your choices are now huh?”

Tracy had gone shopping online and despised most of the things available in her size.

They moved on to rowing and a bit of lifting. All of which Tracy now found extremely hard. By the time their workout was over, she was exhausted mentally and physically.

Heading into the locker room, Tracy kept hoping that she’d see the mysterious woman again and she could switch them back but she never appeared.

She didn’t show on Thursday or Saturday when the two of them met up again. Or the following Thursday after Tracy had claimed she had to work late on a project and couldn’t make it to the gym. The project was what she called her large pepperoni and sausage pizza.

After a month, Tracy claimed her left knee was hurting and she needed to take some time off. Two weeks later, she stopped replying to Claire’s texts.

Claire got the hint and booked a new person for her Tuesday, Thursday and Saturday slots.

One year later…

“I’m on pace to beat my personal best time…one more mile to go”

Claire Mason felt an extra adrenaline surge and picked up her pace slightly as the finish line came into view. “3 hours, 6 seconds! A new personal best!” she thought as she crossed the finish line with her arms above her head and a smile on her face.

She walked a bit to cool down as she grabbed an orange and a bottle of water trying not to cramp up.

As she walked, she saw a familiar face working along the side. A woman she hadn’t seen in about 10 months was helping organize the medals on the table. “Hey Tracy” she said as she came over.

“Claire?” Tracy said blushing “I didn’t know you were running these”

“Yeah…this is my 3rd one now…I didn’t know you’d be here” Claire said “I love it”

“My company is one of the primary sponsors of the race…they wanted all of out here either at the water stops or at the start or finish lines” she shrugged.

“Oh I see” Claire said. “Well for what it’s worth, I miss working out with you”

“Yeah…I just, I just couldn’t anymore. It was so hard. My knees really did hurt and my back. I just lost my motivation for it. I got a cross trainer for the house and try to watch what I eat” she shrugged “but…I get it now”

“How many times do you use your machine?”

“I used it twice…then…” Tracy said looking away.

“Now it’s a clothes hanger right?” Claire laughed.

“I found a really pretty purple dress right and it hangs on the right handle” Tracy smiled. “I’m almost done…My replacement is coming over…maybe we could catch up a bit while you cool down”

“Yeah sure” Claire replied.

Tracy finished up and made her way over. She was wearing sneakers, warm up pants, at-shirt with the marathon logo on it and a zip up sweatshirt over the top. “There’s a smoothie place right around the corner”

Claire still wore a towel around her neck as she walked with Tracy. She stayed a step behind her and she smirked seeing Tracy’s wide ass swaying, a slight zipping sound coming from her warm up pants as they rubbed together “Oh God never again” she thought “I can’t believe I looked like that, that I acted like that; no motivation, no drive…never again”

Tracy chatted over her shoulder as they went inside “I’ll buy…what do you want?”

“Strawberry, banana and watermelon” Claire said before getting a table.

Tracy made her way to the table and hefted herself up into one of the high seats. She had to balance herself as he hopped up. Her thighs spread out, her ass came off the sides of the stool and she blushed.

“So…have you adjusted to this type of lifestyle” Claire asked rather bluntly.

“Have you?” Tracy shot back as she took a sip.

“I didn’t mean it that way” Claire said “I just meant that do you realize it’s been a year. One year ago today I was the heavy one…You were the…”

“Skinny one? Fit one? Fitness fanatic and now I’m the fat ass who can’t drag herself to the gym?” Tracy asked with a smirk “Or did you mean the one that had their life flipped upside down? Because I distinctly remember being told that not only were our body types and weights flipped but so was our will and our confidence”

“Well yeah…” Claire said

“So when you’re out there so proud of your body and the fact that you’ve ran three marathons this year, you’re doing it with what I had. With my genetics and my drive while I somehow got stuck with yours” Tracy said getting worked up.

“Well hello Claire…you’re looking lovely and Tracy…you look the same as you did a year ago”

Both women spun around only to see the woman from the gym standing behind them.

“You!” Tracy said.

“You?” Claire echoed.

“Yes ladies…mind if I join you?” she said taking a seat next to Claire “Thank you…I see you two are catching up…Pity you didn’t stick with your gym routine Tracy but, I knew you wouldn’t”

“You turned me into a chubby girl!” Tracy said. “You took my body; gave it to her, took my competitive drive, gave it to her all the while I gained 100 pounds and the feeling that it was what I deserved”

“Are you unhappy? You have a good job, a loving family…is it really that bad?” the woman said. “Your model thinness…oh, poor you”

Claire had remained quiet.

“And how about you? Tracy here thinks you got the better end of the deal?” the woman said to Claire.

“Well frankly, I love it. I love looking like this and feeling like this”

“So you wouldn’t want to go back?” the woman asked Claire.

“No…not in a million years” Claire said shaking her head “I’m sorry Tracy but there’s no way I would ever want to go back to original body”

“I never said you would” the woman said and Claire visibly relaxed. “You already understood what it was like to be like your old self. But you…you Tracy needed to be humbled”

Tracy looked away.

“You learned your lesson” the woman said simply. She pulled out of her bag a maroon dress and a pair of black heels and placed them on the table in front of Tracy.

Tracy looked up with her jaw hanging.

“Put them on when you are alone…I think you’ll be pleased with the outcome”

Claire crowded over as Tracy looked at the tag saying size 20 inside the dress as well as seeing that the heels were a 9 wide.

“But does this mean…?” Tracy said but the woman was gone.

Tracy took her drink to go.

Claire was at home recuperating from her race that night when her doorbell rang. She got up, and walked to the door rather stiffly.

“Ready to go clubbing?”

Claire’s jaw dropped at the stunning woman in the skin tight maroon dress and black heels.

Firm and fit with big brown eyes and long brown hair cascading over her shoulders.

“Is that dress a size 4?” Claire asked as a smile spread.

“You know it honey…I’m back” Tracy said throwing her arms out to show off her returned body. “Do you need a partner? I got my physical trainer license back haha but tonight, I’m ready to party”

“I’ll get my blue dress and silver heels out” Claire said.