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Muscle Growth Caption Series

Writer's picture: Ariyana FAriyana F

It doesn’t take long for you to dress up in a semi-decent outfit and head to the party, feeling like you might finally have the confidence to tell the girl of your dreams how you feel after you’ve had a few drinks.

When you finally spot her, though, you stop in your tracks, wondering if you’ve come across someone else. You’ve just seen her before the summer at graduation, there’s no way she could’ve changed this fast, could she?

You approach her, trying to plaster on a fake smile as you say, “Hey, Tiffany?”

She turns away from her current conversation and smiles brightly at you, “Joe! Long time no see!” She grabs you into a hug, and you almost drop the drink in your hand. It feels like a hug from a random guy at the gym rather than the hugs you’ve experienced from her before. She squeezes you so hard you feel like you can barely breathe, and her arms feel like trunks winding around  your neck. 

You can’t help but let out a loud ‘oof!” which makes her pull back a little, “sorry, sorry. I forgot how much stronger I’ve been recently.”

You feel a little embarrassed as you take a few steps back and ask, “yeah… I was going to ask about that.”

She shrugs like it’s completely normal. “I’ve just been following a new routine, and it’s been working really well. I think I’ll be able to really compete with the guys on the weightlifting team at school!”

You don’t know how to think about all this. You’ve never wanted the woman you’re with to be more powerful than you, but how could you compete with something like that!

She seems absolutely ecstatic as she now turns and shows off her back muscles, and you realize she’s picked out a dress that shows off her arms and shoulders completely. 

As she turns, the sinewy definition of her arm and shoulder muscles becomes strikingly evident. With a subtle yet confident smile, she flexes, showcasing the power beneath her skin. It's a moment of silent assertion, a demonstration of physical prowess that you know has you completely beat. 

She swivels back around with a fluid motion, and as she does, the trapezius muscles ripple gracefully across her shoulders, forming defined peaks. She sees the expression on your face, which you find difficult to hide. There’s no way you’d ever be able to hug her without feeling the stiffness of her all over, especially those bulging arms. It’s just not what you wanted. You feel both jealous and hurt. 

“Aw, don’t look so down. Maybe I can teach you some of my new techniques? We can work out together, I’ve been helping lots of people!” 

Normally, being able to spend time with her on your own would be a dream… but this dream now feels bitter on your tongue.

You try to look cheerful once more as you step further and further back from her, “ah. I hope you make the team. Gotta chat with a few other people, see you when I see you!” Before you let her respond, you turn your back on her, feeling like someone had just punched you in the gut. Well, with how big her arms are now, it definitely was a possibility from her.

You leave the party at once, hoping you wouldn’t have to see her regularly at college, because her current transformation is already too much for your brain to handle.


You’re excited. It’s your first time going on a trip with your long term girlfriend, Kate, you’ve outdone yourself. You rent a large suite in Hawaii at the top floor of the hotel, making sure you have a decent view of the beach, and even mute your phone so you’re completely isolated from the rest of the world and their distractions.

You’re secretly stoked to see your girlfriend in a bikini for a week straight, and can’t wait to show her off to other guys at the resort. 

Having nothing planned the first day, the two of you lounge at one of the eight pools dotted throughout the facilities, and you can’t help but let out a breath of pure relaxation.

Kate doesn’t seem to be able to sit still though. She leaves around an hour in, leaving the rest of her pina colada for you to finish. You try not to let it get to you, and go back to closing your eyes and enjoying the sound of the music filtering through from the speakers. 

She comes back after two hours with a grin on her face. You’re still a little annoyed, but ask her what she’s been up to. 

“There’s an awesome gym right next to the pool!” She says, sporting a large grin on her face.

“And? There’s plenty of gym equipment in your condo back home, too.” You frown, “I thought we were here to relax.”

“Yes, but this one is way better. Also, there’s this protein drink they give to everyone for free. I chugged mine down already, but it tasted amazing.” 

You finally turn to look at her, and realize she’s still coated in sweat from the workout. She’s been more and more into going to the gym lately, which you’ve been supportive of, knowing her body could only get even more spectacular. 

On the other hand, this particular workout seemed to really strengthen her muscles, because her abs seem even more defined, and her arm even sported a fine vein, which you’ve definitely never seen before. “Wow, you must’ve really gotten in there.”

She nodded, “yeah, never felt so good.” She leans down and kisses your cheek. “I’ll go shower now, then we can go back to the suite.” 

The same thing happens the next day, then the day after that. Kate seems absolutely obsessed with the gym here, and you’re getting to the point where you’re unable to hide your annoyance. On the third day, you wait for her to leave and decide to follow her. You watch from outside the large gym complex as Kate stands near the back, chugging a giant milky protein mixture. 

She steps into the spotlight, and your mouth hangs open. You don’t think you would’ve recognized her if she didn’t have the long blonde hair. Her abs are toned to the point where a six pack is clearly evident, and her arms look like they could snap your neck if they got you in a headlock. There’s already sweat glistening on her as she sets down her empty drink and starts to stretch, really showing off all of the newly developed tone muscle.

You shake your head as you stand there, completely speechless. This must’ve been some sort of nightmare. There’s no way muscle is able to naturally grow this fast. There had to be something going on.

You open the glass door and head inside, unable to hide your bewildered expression, “Kate! Look at you!”

She looks at you then glances down, “I know, right? I look absolutely spectacular!”

“No, this isn’t you at all!” You feel as if you’re starting to sound whiny, but this is not the girl you fell in love with!

“I feel like I could pick you up with just one arm!” She adds, her smile widening further. “I bet it’s this drink! I might just purchase more from them to make some at home!”

Feeling as if there’s nothing you can possibly do to convince her something was definitely wrong, you leave the gym without saying anything to her, sighing heavily as you do.

After taking a swim in the ocean, you come back to shore to see her laying on one of the lounders with yet another bottle of her protein shake. She’s wearing one of your favorite bikinis, dark blue with shiny white sequins on top, and she waves you over. You glare at her distinct six pack as you begrudgingly approach.

“I’m going to be heading out with a few of my new gym friends soon, hope you don’t mind!”

This was the last straw. You turn around and walk off, knowing you’ll probably spend the rest of your life avoiding her at all costs…


You’re ready for the golfing tournament. In fact, you’ve never prepared for anything so much in your entire life. You know you’ll be able to crush them, and you confidently stroll across the fields, smiling at all the other participants and the audience on the way there.

You stop in your tracks when you see her, though. There’s a sort of familiarity there, but you can’t quite place it. There was just no way it was actually her, right?

You put on your usual wide smile as you approach, and reach your hand out, “hey, my name’s Joe. I’m one of the competitors today.”

She smiled and said, “Emily. Emily Kravesky,” and shook your hand with a tight grip. You had a feeling that’s who she was… but it couldn’t be possible. Last you’ve seen her on TSN, she was scrawny and small, and definitely didn’t have this physique. It didn’t really affect who she was as a golfer but… this kind of muscle growth couldn’t be normal, could it?

She exuded strength as she stood in a black t-shirt that clinged to her well-defined upper body. The fabric stretched tightly over her muscular arms, showcasing the sinewy contours of her biceps and forearms. She wore black golfing gloves on her hands, and below the waist wore a vibrant red pleated skirt that contrasted her to the rest of the crowd. The skirt hung just above her knees, allowing a glimpse of her powerful thighs. These thighs are notably sculpted, the muscles evident beneath the fabric as she moved with purpose. Each step is deliberate, emphasizing the toned and athletic build that extended down to her calves. Her blonde hair was pulled back into a tight ponytail, a practical choice that further highlighted the defined lines of her neck and shoulders. She seemed like she knew exactly how to show off her new body, from the way she moved down to the way she dressed. You found yourself almost speechless as you stared at her.

Realizing you had been watching for too long, you say, “I remember seeing you on TV a few weeks ago… I’m pretty sure it was live TV but…”

She grinned and finished your sentence for me, “yes, I’ve gone through quite the transformation, haven’t I?”

You nodded, so transfixed by this you’ve forgotten the game all together. “How did this even happen? And so fast?” 

“I’ve been getting that question a lot actually,” she replied. “I found a new trainer at the gym, who kept encouraging me to go faster and harder. I didn’t even know I wanted a body like this until I kept pushing every single day, until I got to where I am today. Now, I just can’t stop. I love the way people stare at me when they walk by, like they’re intimidated by me but also super impressed.” With a confident grin, she raised her arms, inviting attention to the impressive display of strength. As her biceps contracted, the fabric of the black t-shirt tightened, revealing the well-defined contours beneath. The sleeves of the shirt rode up slightly, exposing the lines of veins on her forearms.

You almost want to reach out and touch it. Sensing this, she nodded towards it, “c’mon, I won’t bite.” Your fingertips made contact with the firm, warm surface of her flexed muscle, tracing the outlines of the well-defined contours beneath the fabric. The sensation conveyed a sense of power, and your touch lingered for a moment, exploring the result of her dedication to physical strength. Her bicep responded to the pressure with a subtle give, and she winked at you before you pulled away. 

You gulp and say, “well, I never thought I’d be so intimidated by a woman like this.”

She laughed out loud, “I’ll probably stop golfing soon, actually. I want to focus 100% of my attention on getting bigger, and golfing is inhibiting that.”

You feel like a fool now. Maybe you should stop golfing as well. It seemed like a sport for kids, one that could never make you look as strong as her. 

The bell for the beginning of the tournament began ringing as you suddenly decided to pivot your entire career from this one interaction, “do you mind giving me your new coach’s number? I’m very interested.” 

They were calling your name as you saw her shake her head and say, “sorry, he only trains girls, hopefully you find someone else that will be willing to take you!” 


You’re on your usual run when you hear it - the sound of distress, and you’re not sure where it’s coming from. You walk down a grassy hill and cross a fence, feeling like you’re coming closer and closer to the sounds. You eventually reach an area with a few large boulders, and you hear the found distinctly now - a cacophony of soft meowing, though you don’t see any kittens anywhere. You begin flipping over some rocks to see what you can find when you hear a voice right behind you, “what are you doing?”

You turn around to see a woman, someone you’ve seen on runs before, though have never spoken to. She looked insanely impressive.

You stand in awe as you observe her, a Caucasian girl with intense determination etched across her face. Her black hair falls effortlessly, framing her face, with stylish side bangs adding a touch of flair. She was wearing a black and yellow Nike sports bra, helping her show most of her physique. Your gaze descends, and you can't help but marvel. She wore short black pants revealing most of her legs, but it's her midsection that truly captivates your attention. The definition of her six-pack is a testament to countless hours of disciplined workouts. Each abdominal muscle is sharply defined, forming a tight and enviable core that must be rock hard to the touch - and she didn’t even look like she was flexing!

Moving to her arms, you're struck by the remarkable display of muscularity. Her biceps and triceps are larger than you’ve ever seen. The triceps brachii muscles gracefully extend, creating a noticeable separation and highlighting the sculpted tone.

You try to think back to whether you’ve seen her up close before, and whether she’d always been this muscular. You feel like you would’ve noticed it before, but maybe you’ve just always been distracted on your runs.

“I can hear the sound of kittens mewing… but I can’t find them anywhere.” She arches an eyebrow but seems to hear them too, and begins searching with you. It takes you both just a moment to discover that they seem to be stuck under a large boulder, and unable to get out.

You reach forwards to grab the boulder, knowing exactly what you have to do. You want to impress this girl, and don’t want her to have to help you whatsoever - despite her clear strength. You brace yourself as you begin to lift the boulder, and of course, your worst fear comes to life, because you can barely shift it a single inch.

You look back at her with a blush now forming on your cheeks, and you try to look as unembarrassed as possible. It seems she feels the awkwardness for a few seconds as well, and stares at you before she moves forwards and lifts the boulder herself.

You stand there, mesmerized, as she approaches the large boulder with an air of confidence. The anticipation in the air is palpable as she takes a deep breath, preparing for the lift. As she bends down, her muscles engage in a choreographed display of strength.

First, her powerful quadriceps tighten, providing the initial force needed to push off the ground. You can see the defined contours of her thigh muscles contracting, the result of countless squats and lunges. Moving upward, her glutes flex, adding a crucial boost to the lifting motion. You see the muscles in her lower back and lats work as well.

With a final surge of power, she straightens her legs, and the boulder rises effortlessly. You step back, feeling like you’ve been utterly defeated.

She tosses the boulder to the side, exposing a litter of kittens who look pretty worse for wear, but that’s not really your focus at the moment.

“That was amazing,” you can’t help but say.

“Ah, well, don’t be so hard on yourself. I’ve been registered for an experiential experiment that increases muscle growth very rapidly. Unfortunately it’s only for women, so you wouldn’t be able to do it,” she gave you a pitying look, and scooted down to look at the kittens. “Going to take them to the vet, don’t worry about it.”

“Oh, is the experiment still running?” You ask, half wanting her to leave to save you more embarrassment, and half wanting her to stay so you can learn more.

“No, but I’m one of the few that’s signed up to keep taking it indefinitely. Couldn’t pass these puppies up,” she said, flexing both of her arms at you.

“It’s going to make you keep growing?”

She nods, “I love the feeling. I want to keep doing it forever if I can.”

You’re scared to imagine what she’d look like after a few more weeks of the experiment…


Every year, your family goes on a trip to the family cottage. Though you’ve never really been very thrilled about it, you’ve always taken part in it, knowing your mother would probably be very upset if you didn’t show up one year.

This year, though, the talk of the family is your brother Peter’s new girlfriend. He’s shown you all pictures, especially when they go on trips, and things seem to be moving pretty fast. Frankly, you’re looking forward to meeting her as well, mostly because he’d never liked someone enough to bring them home before.

You arrive before him, and spend a few hours helping everyone unpack and clean up the cottage after a year without anyone staying in it.

You hear your mother get up, though, as she heads to the door, excitement clear in her expression. “They’re here!”

Like the rest of them, you get up to see, watching as your brother opens the door for her and lets her out. She immediately looks different from her photos to you. She’s wearing a sporty jacket, which covers her upper body, but there’s just something about her… the way the jacket falls on her angular shoulders, like she was hiding something underneath.

You leave the house first, and give your brother an embrace, then Sandy. You can immediately feel it - she’s muscular. Insanely muscular.

As you wrap your arms around her, you immediately notice the firmness beneath the thin jacket. The sensation is unlike any other hug you've experienced – her muscles feel dense and powerful. Your fingers can feel the defined contours, and you can sense the strength that lies beneath the surface. The hug is tight, and you can feel the subtle tension in her muscles as she embraces you. The jacket may be thin, but the sensation of her powerful form is unmistakable.

The hug is quick, and you release her as you stare at her in confusion. She was definitely not muscular in her photos - not at all. It was like a different version of the Sandy you had in your head all together. The delicate girl had turned into a strong bodybuilder.

Your brother acted as if everything was normal, and you figure it’s not really your place to ask, though you spend the rest of the evening very confused.

The next morning, you sit on the shores of the lake by the cabin, enjoying the crisp early morning on your own. It’s that moment that you spot her as she emerges from the crystal-clear lake, droplets of water cascade down her sun-kissed skin, her long, curly golden blonde hair clings to her shoulders, dripping with freshwater. The pink camo bikini set she wears is small, so small you can basically see every single part of her body.

With each step closer to shore, you can't help but notice the powerful muscles rippling beneath her bronzed skin. Her shoulders and arms carry the definition of someone who's dedicated countless hours to sculpting their physique. The water droplets trace the curves of her well-defined biceps and triceps. As she moves, her abdominal muscles flex, revealing a toned and chiseled midsection. The pink camo bikini does nothing to hide her physique like the jacket did. The muscles in her legs, sculpted and athletic, propel her gracefully out of the water, leaving a trail of splashes in her wake.

You feel like you’ve unlocked something deep inside of you as you watch her. Like you never knew this type of woman could be your type, but now it’s the only thing you can think about.

You practically run back to the cabin, hoping to see your brother before they’re in the same room at the same time.

You spot him, and without even saying hello, you splurt out, “your girlfriend is so different from her photos! She’s definitely not the same girl.”

He lowers his coffee onto the counter, and begins to chuckle, “I’ve already heard the same from mom and dad. She’s just really into working out these days. Nothing weird about it.”

“Yes there is! People don’t get so big so fast!” It’s then when you hear her open the front of the cabin door behind you, and you immediately stop talking, worried about what she might think. You also don’t really want to be in the same room as her. What if your brother finds out about your new infatuation with her?

“Hey Sandy, my brother says he likes your muscles.” You blush, and watch as she towels herself off.

“Oh?” She says with a grin. “Maybe I can introduce you to some of the girls at my gym who are doing the same regime as me.”

“Ah… well… that might be good.” You say, and embarrassingly leave the room, closing the door of your bedroom behind you with a gasp.


The study started exactly five weeks ago, with most of the girls coming in to get weighed and measured once every week. You’re a student as part of a new steroid injection study needing to be approved by the FDAs, but so far it’s not looking good for getting approved, mostly because of how well it works.

You become more and more fascinated by the study as the weeks go by, mainly because you’re eager to see how the women you’ve met have been changing, so dramatically so you can barely recognize them when you come in.

You’re in charge of measuring their circumference, weight, and muscle density, and you can’t help but be insanely impressed by their progress, especially since they’re not allowed to do anything else other than to take the injections. Imagine what it would be like if they actually worked out along with it!

Meghan has been one of your favorites. She’s energetic, with a long blonde ponytail and always had her nails painted, and you’ve been there to watch her every step of the way as she turns from a petite girl that could be pummeled by most to one that would be feared by most fighters.

You’re one of the people watching her video tape today, and you stand in the corner as the interviewer asks her questions about her progress in the study. You think back to her transformations every week as you watch her smile, and you wonder if you’re starting to develop a huge crush on her.

Week 1: The first week after the steroid injection ushers in a noticeable surge in muscle development. Her arms, once slender, now reveal a sudden increase in mass as biceps and triceps bulge with newfound strength. Leg muscles undergo a rapid transformation, with quadriceps and calves displaying a significant boost in size and definition.

Week 2: The second week brings about a stunning evolution in her physique. Biceps and triceps now command attention, displaying a remarkable increase in size and vascularity. Leg muscles, particularly quadriceps, have grown substantially, creating a more defined lower body. The dramatic growth is evident in every movement as her body adapts to the accelerated muscle development.

Week 3: The third week witnesses an extraordinary expansion of muscle mass. Her arms have transformed into powerful, well-defined structures, with biceps and triceps showcasing an almost sculpted appearance. The quadriceps and hamstrings in her legs have reached a level of size that forces you to change up your measurement techniques, reflecting the intensified impact of the steroid injection.

Week 4: The fourth week marks an astonishing advancement in muscle growth. Biceps and triceps have achieved an impressive level of definition, appearing larger and more prominent. The leg muscles, including quadriceps, hamstrings, and calves, now boast a significant increase in size, creating an insane lower body. The back muscles contribute to an overall more muscular and formidable presence.

Week 5: The latest week showcases a truly extraordinary change in her physique. Every muscle group, from arms to legs and back, has experienced a dramatic surge in growth. The overall effect is that of a powerhouse, a testament to the profound impact of the accelerated muscle development brought about by the steroid injection.

You know now that there’s no way this can be healthy, and yet the people in charge keep pushing the girls onwards. Of course, many of them have already backed out, being too intimidated by the changes, but Meghan’s different. She’s one of the ones embracing the change, and has actually asked for higher doses occasionally. You know now she’d never give this up for the world.

She finishes up her interview, and you lead her to the study room, eager to do her measurements and be close to her once more.


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