A Gym Diet

Story by Ark Noir on SoFurry

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Well this is something I had just recently made and finished after a few weeks, at the pushing/behest of my best friend. This is actually my first fetish work, so I'm sorry if it's a tad sloppy or bad. Also my first... mature themed piece. But hey, first submission, time to see what people think here.


I sighed as I looked at the outside of the gym, seeing it's voluminous halls in front of me, so large it could fit at least a dozen football fields in it, and that was just from the front, let alone how big it likely was in there. The words Planet Muscle Fur in massive, bold letters over the kind of freakishly large doors in, just alluding to what insanity was inside.

"Damn those two, suggesting I come here for a workout..." I muttered under my breath, flicking my grey furred ears in annoyance, twin bands hanging off the right pointed ear jingling slightly. "I'm gonna be the smallest guy in there. And I got told he'd be 'helping' me get bigger... pah." Sighing, I adjusted the gym bag over my shoulder, already large and thick musculature rippling under the green cloth if the half hoodie clinging somewhat tightly to my upper body, cut off right above the middle of my broad chest, letting the large amount of fur covering it fluff out of the bottom.

Putting my pointed chin up I walked through the doors of the gym, the surprisingly light frames moving with ease, despite being at least a dozen times taller than myself, likely to accommodate the giants that wonder the halls. The inside was as flashy as the outside, most objects on a near macro scale of size, obviously designed for vastly larger patrons, although thankfully having something more normal sized for those who aren't living giants... yet.

Making a beeline for the clean, metallic front desk that's far more normally sized, I set down the gym bag with a heavy thud, starting to talk to the small, but ripped deer acting as receptionist, "Um, hi, I'm..." He spins to face me, a bright smile on his rather handsome face. "Welcome to the Planet Muscle gym! I can see you haven't been here before, so I'll just start off saying the lifetime membership package is GREAT, giving you full access to the whole facility, full meals if you stay for long enough, complimentary massages to help keep soreness away after long workout sessions, and..."

"Ahem, I'm here on a referral." I state blankly, not fully amused with the sales pitch thrown in my face so suddenly. The deer blinks and seems to take a second to register what I said, his mind obviously having to switch gears far faster than it's used to. "Oh, right! Sorry. Who, may I ask, invited you to our... elaborate establishment?" He asked, immediately diving on the computer and started typing things on its keyboard. "Their names are Gilwal Fuchs Ark Fierglief." Sipping some coffee, the receptionist immediately sprayed it right out of his nose and mouth upon hearing the names "THEM? Oh god oh god..." he seemed to panic for a second before regaining his composure. "Ok, so referral. Your name then?" He asked, obviously a bit shaken from just hearing the names.

"Ark Noir. Obviously a sergal, if you need a species for it." I said, gesturing to myself as a whole. "Oh no no, I think the name is quite sufficient..." He muttered, typing away at his keyboard, stopping only to let his eyes nearly bug out of his head at what was on the screen. Oh, ok... well you'll be given a complete pass for today at least, so please enjoy your workout... and with the additional information given I should also add I hope you enjoy the various methods of exercise we provide for your growing needs. If you would put your hand on the scanner..." He gestured to a massive pad in the counter, looking a bit overly opulent in its well curved design.

I shrugged, noting how the two seem to get in trouble all the time so they likely trash the place a bit when they come by, putting my hand on the scanner, waiting for the light that suddenly appeared to dissipate to take it off. After the few seconds it took to scan, and at the nod from the receptionist, I took my hand off and grabbed my gym bag off the floor "You now have access to all the rooms, just go ahead and put your hand on the doors scanner and it will let you in." He seems to pause awkwardly, not sure if he should say anything for not. "Enjoy your visit..." He mutters, hurriedly diverting his attention to a stack of papers that apparently need a restacking.

After staring at the oddly acting receptionist for a minute, I shrug and walk past the desk and down the giant, wide hallway, ignoring the normal locker room, knowing I can just heft my bag where ever I need it, not like it was heavy to me anyway. Walking down the hall I pass by many different doors, all leading to the vast and varied rooms of all weights and sizes, of metal and patrons, the heavy scent of sweat lingering by each door. Spotting a door for the more muscle-bound, normalish sized person weight room, I decide why the hell not and push through the door, somewhat eager to see what this apparently growth prone gym can do.

The inside wasn't very inspiring, large amounts of weights just sitting there on the many, many racks, a mind boggling amount of sizes, shapes, types, and weights, some small, feeble five pound weights all the way up to ten million pound monstrosities of metal, waiting alongside rather normal looking equipment for them, with nothing directly special about them, and a few furs wondering around, of varying sizes, all of them more intent on the weights than the newcomer to their room.

Shrugging, I toss my bag near a bench, quickly taking some 'lighter' weights off the racks, pairs of 400 and 600 pound barbells, just to get me started. As I get close to my bench, I suddenly lose my balance from a shove against my back, letting the ton of metal fall to the ground with a resounding clang, falling on top of the barbells hard. Grunting, I roll off of the metal, trying to see what pushed me over. Walking away, snickering, is a red wolf of similar size to myself, only difference being the giant, massive bulge in the only piece of clothing he was wearing, a thong far too small for a creature of his size, letting it sway around and get shown off just simply by walking.

Growling slightly and glaring at the interrupter, I pick myself up and dust my front off, grabbing the barbells off of the floor and bringing them to the bench without further incident. Letting them drop onto one of the ends of the bench, starting a pre workout stretch, taking my time to make sure all the kinks were worked out of my muscles and they were relaxed well for the heavy lifting they were going to be subject to.

After the short but through stretch, I sat down on the bench, taking all the mass on it admirably, and picked up the pair of lighter, 400 pound dumbbells, starting a hundred reps or so for each arm to properly warm them up and limber them. Muscles bulging, each rep forcing the thick arms to flex under the cloth arms, outlining themselves beautifully against the taunt cloth, even a few thick veins finding a way of showing up against the hoodie. Murring gently at my own display of raw force, I continued my exercise, content to watch my body bulge and flex repeatedly, over and over, already a hulking form in its own right.

After a long and rather excitement riddled basic exercise, I sighed and put the dumbbells down, clutching my hardened abs as they growled. "Damn I should've ate more for breakfast..." I muttered, reaching behind the bench for my gym bag, as it held some water and a few snacks I could use to tide me over. I pawed around, puzzled as my hand found nothing. Leaning over to check, I saw the bag was simply gone.

"The hell?" I wondered aloud, sitting back up and looking around the room, thinking one of the others may have picked it up by mistake. Glancing around, I spotted the blue bag heading out of the room... in the hands of the disrespecting wolf that had shoved me down. "Hey, that's my bag!" I yelled across the room, the wolf spinning around, staring wide eyed as he found out he had been caught, bolting through the door.

I ripped across the room on powerful legs, nearly ripping the door off its hinges as I skidded to a stop in front of it, instead having to wait for the scanner as I hurriedly put my hand on it. Cursing my luck as the door opened, I quickly stepped out into the massive hall, glancing left and right to see where the wolf went. Catching his tail going into a room further up the hall toward the entrance, I turned and ran over, looking more like I was bounding than actually running.

Stopping forcefully in front of the door, I glanced up at the sign as I used the scanner, plainly stating it was the locker room for furs with similar sizes to my own. Deciding to take the sneakier approach, I crept into the locker room, peeking around corners for the thief. A short search placed him, predictably, on one of the changing benches, rooting through my stuff in the bag, mercifully his back to me. I snuck up on his, far quieter than one would believe with such mass, closing the gap quickly.

Tapping on the wolfs shoulder, he jumped, turning to face me as I stood there with crossed arms. "You have something of mine..." I growled out between my teeth, staring down at the wolf. "I'm sorry I'm sorry! I was told to steal it and-"

"Shut up." I snap, not wanting to hear the excuses of the groveling fur. "You shouldn't have done that in the first place. Now I have to figure out how to make you pay for stealing from me." My own question answered its self as my stomach growled again, starving for food. A creeping grin covered my face, a frightening thing to behold with the show of an ungodly amount of teeth, staring at the would-be thief. "And I got just the thing..." I said, leaning down with the evil grin on my face, eye level with the slumped over wolf.

His eyes widened as he seemed to realize the implications, however his reactions were too slow as my maw opened and rushed forward, and engulfing the red furred wolfs head with a powerful chomp, instantly muffling the cry in the slick tunnel entrance of my muzzle. Gripping the sides of the wolf as he struggled, trying to force his way out of my maw, but only enticing me to take even longer, tongue licking the muzzle as it gets ever so slowly pulled in, an enticing flavor reaching my taste buds. Shivering from the prospect of such a delicious meal, I force the head down into my throat with a firm gulp and a shove from outside, drooling all over the neck as it found its way into the muzzle, enticing my tongue to slide and taste it, taking in the favors the wolf could provide it while he made his way down.

Moaning slightly in euphoria, stomach growling loudly in protest at the slow pace, I stretched my mouth over the shoulders of the whining wolf, forcing the head of the poor fur to distend my own neck, a strong outline of the prey forcing its way out. Sadly only temporarily as another strong gulp pulled him in deeper, head disappearing down into the depths, his arms starting to lock to his sides as they were next on the menu, forced to struggle by wriggling around, as little good it did, only making the devouring of the sorry thief even more enjoyable.

Lingering at the shoulders to let him feel the last visages of his freedom slip away as it was painfully slowly consumed, the large muscles sliding down deeper into my hungry maw, flavors enticing my tongue as it slid over the drool slicked form. Hunger finally getting the better of pleasure, gripping the prey firmly, a combo of powerful gulp with a heavy push forcing a large portion of his body in, forearms sliding out of view for the outside world and into the slick, wet interior of my gullet.

The urge to feed and consume the helpless wolf gripped my mind; whispering for me to shoving him down as fast as possible, force his wriggling, struggling body deeper into my throat, gulp him down to my stomach to let him await the end of my fun and the eventual digestion for his crime against me. Unable to properly resist, I dragged more and more of the show off in, arms slowly but surely finding their way into my maw, never to be seen again. The one major obstacle being the giant bulge hanging from his waist rearing its head, bumping against my chin, making me drool even more at the prospect of such a distended bulge sliding down my throat, writhing as its owner tried to escape feebly.

Opening even wider, my long, wedge muzzle sucked him down, starting to envelop the sex of the doomed prey, chewing it just slightly to torture the poor thing as his head pushed into my hungry gut, the rest of his quickly following it in stride as my hungry self devoured the red wolf. Sighing around the meal still in my mouth, I gulped down the last of the bulge as it slid in, forcing my stomach to bulge it's self out against my thick abs, filling up rather fast with the giant meal. The rest of the wolf provided not nearly as much enjoyment, more akin to a noodle as it slowly got slurped down deeper and deeper, tapering off until the feet remained, the rest making its way down into his final resting chamber.

Wanting to feel the complete fullness of the wolf, I greedily wolfed down the feet, ending the presence of the bad thief to the outside world, being nothing more than a growing ball in my stomach as he slid down toward it. Sighing, I sat down in the bench, looking down as my stomach grew larger and larger, filling up more with the thrashing food, escape nothing but impossible now as his entirety falls prey to my hunger.

Groaning, I laid down on back across the bench, clutching my giant, massive, wriggling gut, sometimes the hands, feet, and head of the doomed red wolf pressing hard enough against my heavily distended stomach to force its shape out, only to sink back from his constant movement. Setting my head back, I reveled in the struggles, muzzle opening slightly as I panted in excitement, perfectly willing to delay the inevitable so long as he kept writhing and squirming around in vain hope.

The feelings built as he seemed to struggle more and more, electing pleasured moans from myself, all of it getting to me as my pants started to feel the strain, damp wetness spreading out over the cloth above my own hefty package. The few minutes it took dragged on like hours, never ending in the pleasure of feeling the helpless prey struggle about. Although it all had to come to an end, as the wolf slowed down his thrashing attempts, eventually stopping, the giant round prey filled ball coming to a rest jutting out of my abdomen.

Tilting my head back up, I poked the gut, only feeling a small amount of wriggling in return "So you gave up? That's kinda disappointing, I was having some fun there... I guess that means I'll have to move onto the next part of the entertainment." I told the stomach, the floodgates releasing as it started to gurgle powerfully, churning it's self as the wolf faded out, gut softening slowly as he was digested. As the stomach did its fateful work, the progress it did make was apparent, as the swollen gut shrunk down, equalizing against the muscles as they started to pack onto my body, filling me out with even more deliciously powerful mass.

My clothing, barely able to hold themselves together as is, creaks as they slowly started ripping apart, tears shredding across them with resounding snaps, grey and white fur poking out from between the hewn seams, muscle soon after as the rips widened with each surging growth. All I could do was lay across the bench on my back, mouth open and tongue flopped out of it on the side, eyes half closed from the blissful feelings of more and more mass adding it's self to me, growing my frame ever stronger and larger. The minutes passed like days, but it ended all too quickly, the prey filled gut disappearing into rocky abs jutting out farther than they were before, ending the experience of pleasure. I enjoyed the new sensations of my larger self, having grown probably at least an extra foot and a few hundred pounds heavier, all in the pure, bulky mass mostly exposed from between the massive gaps in the shredded cloth covering myself.

I laid back in the afterglow of such an experience, one that never got old and was always so great. After the lovely feelings washed away, I groaned as I got up, muscles a little stiff from the new mass, only for my pointed nose to get smacked by something. Giving a surprised yelp I jumped back, rubbing my nose some as I opened my eyes to see what I hit. I groaned as I saw the shiny, pointy and blue head in front of my face, capping a hugely thick shaft down to between my legs with a massive knot at the base, the cloth around it wet and in useless shreds, hardly doing their job of covering it up. "God dammit now it's gonna be awkward to walk, let alone go around the gym like this..." I muttered, staring at the draconic like tip as it drooled, fueled by the remnants of the excitement from just minutes before.

Rubbing my face I got up off the bench, rubbing my face as I carefully tried not to smack myself in the face again with the long blue rod. I stooped down a little to pick on my gym bag, the extra height not helping in its retrieval with the heavy hard on threatening to smack me if I so much as step. Dropping the bag between myself in the stick of doom to push it away somewhat, I took a water bottle out of the bag, looking at how rather comically small it was in my hand compared to when I filled it up this morning, shrugging as I simply bit the top off the cheap bottle and spat it out, chugging the contents down to help wash down the rather dry meal of fur.

After a second of guzzling the water and tossing the empty bottle into the trash, I sighed, starting to walk over to the door of the locker room. "Might as well head out to work out some more before I head ho-GRRK." I stopped, clutching my stomach, the organ growling heavily as it went waves of hunger pangs, screaming for more food to be forced into it, more and more to the suddenly voracious cavity. My mind worked to contain the sudden onset of hunger, trying to think of why it suddenly craved a stuffing of a lifetime. The only thing that could come up was the grinning smirk of a certain massive blue fox and red dragon as he left, the sly smile always meant both of them were up to something... like this.

"I'm gonna get that bastard for this..." I mumbled, starting to get what the two were planning all along. Growling and clutching at my starved stomach, I knew I wouldn't be able to withstand the induced hunger very long, mind already slipping into one of a very, very hungry predator... who happens to be among many, many different meals to satisfy the endless gluttony. Just letting it go to the powerful drive I stood back up straight, the hunger biting at my abs manageable enough as I walked calmly back out into the hall, briskly turning back toward the work room I so quickly left, gut groaning with the anticipated dinner date with every last person in that room.

The short walk seemed nearly like a millennium, entering the weight room with little fanfare. The other occupants seemed not to notice, likely thinking the bad red wolf had been taken care of my security, none even recognizing the throbbing, blue rod bouncing in front of my larger body. Working with the advantage, my eyes keenly scanned about the room, picking out potential first meals for this course. Spying a lone fox out of the way along the back, I started stalking her, working myself up behind her, silently creeping up directly behind her, muzzle open and drooling at the prospective meal sitting right before him.

Looming right over her, I opened my muzzle slowly to strike at the unaware prey under my gaze. Drops of saliva dripped down onto her head, making the fox look up, shock unable to register on her face before I stuck fast as a snack, mouth engulfing her head instantly and deafening any screams, arms wrapping around her body and locking it to the frame of the equipment she was using to preventing her from flailing about and causing too much noise. Sheer hunger overriding the pleasurable taste as I drew a massive gulp, quickly sending her head into my throat, bulging it out heavily as her head shaped it's self against the white neck. Excitement got the better of me again at the blue shaft stood to full attention from my groin, prodding and dragging across the back of the new meal, a small trail of slime getting left behind it as it dribbled from its head.

After a few short gulps, her bust found it's way into my gullet, far harder than the pecs of the previous male prey, but even their respectable girth couldn't prevent it from making its way into my throat. tilting back my head, I took the rest of her upward, the firm grip my muzzle had on her keeping her firmly locked on the path to her new home, gravity and her own weight helping push her down farther and farther with each passing gulp. Before long her shapely hips passed through my thin lips, legs little more than slurp away to make her mine, forcing her to settle down into the now again bloating gut.

Sighing, I patted my now full belly, the poor fox girl wriggling about in her attempts to escape my confines, completely pointless now that she has found herself trapped within. The hunger having dulled to a minor ache, I sat down on the now unoccupied piece of equipment, believing it to be done and satisfied, closing my eyes to just enjoy the second meal of the day. My enjoyable reverie is interrupted though by a loud gurgle and the sudden stop to the flailing of my trapped prey. Looking down, to my shock she had already been digested, my stomach slowly going down as my body absorbed her, causing my already strained clothing to simply give up, chest heaving outward and ripping open the front of the much abused hoodie.

The rest followed suit, pants tearing off as my thighs thickened even larger, even the crotch area of the poor fabric unable to withstand the added mass as my far heavier balls forced their way out, hanging low under the even thicker, engorged shaft laying it's self far too comfortably across my front, mussing up my thick chest fur from the pre it's spurting. The arms just gave up entirely, completely tearing off and shredding around the upper and lower arms, thick, new muscle bulging in its place.

As all the growth took place, the hunger slowly returned, it's ferocity forcing me up and to eye the others who sat oblivious to the happening in the far away corner, my muzzle turning into a toothy grin as they all are perfect for fulfilling my hunger once again.

Driven by the hunger digging into m gut, I quickly devoured each and every other fur in the room, each one adding more muscle and just some height, counter balancing it some, by the time the last fur entered my empty belly to squirm, my clothing had completely deserted me, leaving myself in the nude with a large hard on sitting in front of me. Holding my bloated stomach, I knew the starving feeling wouldn't be hold off for long, with each fur not filling me up as much as the last, given my growing size, towering far above what they would be at, having gained several more feet for about a 11 foot tall colossal beast. Walking out of the weight room, I eyes for any more rooms I could find more in.

Grinning as I found a room with furs of similar size to myself, I entered calmly, none taking notice as it seems a fur in the nude isn't an uncommon sight in the gym. Getting to work, the furs in the room slowly disappeared, being replaced by a growing and more hulking sergal, their vastly increased size compared to the others forcing my body to even bigger heights. The euphoria from growing larger and larger and having a near continuously distended gut driving away my own common sense, forcing me into a primal feeding frenzy.

Soon, my size dwarfing many of the current gym residents, I simply started picking them up as soon as I entered a room and shoving them into my greed driven maw, sheer towering size and weight preventing any from escaping by just simply capturing them all at once. The frenzy was doing a number on my body, although in a perfectly good way, muscles rippling outwards as my frame broadens far more than it grows in height, shoulders massive and as large as any of the furs I had first dined upon, arms thick behemoths of muscle that grew by the foot simply by moving them, the rippling muscle only lightly flexing from exertion. My chest fared no better, standing out several feet from myself, providing a perfect resting spot for my chin as it framed my head perfectly against the gigantic traps rising up behind it. My pecs sat perfectly on the well rounded gut, it's taunt mass holding furs squirming and digested, all resulting in a giant mass protruding from my middle. My massive legs sat wide, being forced to the side partly from their immense girth, rippling mass showing across their tree trunk like surface, and partly from the giant orbs between them, churning heavily with potency for the massive member attached to it, just barely on level with my head.

Room after room found its self getting devours, each unaware of the fate of the other, each one having myself leave larger and bigger, a never ending stream of larger and buffer furs to fuel the growing, massive gut. Having devoured all the smaller ones in the frenzy, the last, remaining few were holed up in the last room I had yet to cleanse, the majority of them small giants in their own right, towering goliaths at easily ten to twenty feet tall, several tons of compact, heavy mass and muscle, all in a convenient place to devour them all. They were easy for a being of my stature, standing at a gigantic 45 feet tall, nearly as wide as I was tall with bloated, engorged muscle, simply rippling against each other at the slightest movement.

As could be expected, each and every fur was doomed to be easily devoured, seeming to end my nearly bottomless hunger, all of them distending the broad, tight gut, squirming in the throes of their attempts to escape, all trapped and already on their way to becoming even more mass as my gut gave a great gurgle and stilled it's self.

Sighing I sat down on the floor, my sheer weight cracking the floor in a large crater around myself, rubbing my bloated gut as it fed my muscles for the last time for the day, just glad the hunger had finally subsided and I could think more clearly. The last few tons of mass leaked out all over my vastly larger frame, finishing off its giganticness with perfect aplomb, although the gut did not fully dissipate, remaining slightly from the sheer amount of abdominal muscle packed on far too little space. Leaning against the wall, it caved just slightly, barely holding up my weighty upper body alone, but withstanding just enough to keep it from falling through.

I used the position to relax, resting after the feeding frenzy. I closed my eyes and let the feeling of my complete body wash around me, giant chest heaving up and down with each heavy breath. I sat for several minutes, partially resting and partially reveling in the growth that had just happened. It dragged on and on, an interruption only coming later as I heard something, talking coming down my way, making my ears flick and forcing my eyes open in curiosity.

"Well it's pretty empty, maybe he DID eat everyone."

"You know as well as I do he's got a weak spot for that sort of thing, we just gave him a bit of a push."

"Of course we did, he'd be a wimpy small fry if we didn't. Pretty sure the gym just lost most of their patrons though."

"Hmm? Nah, anyone he eats just comes back somewhere, like in their bed or something. They'll be fine."

"Well at least it means this place will be still in business, I like showing off here."

"Of course you do."

The voices dragged on closer, the two instantly recognizable to myself, making me scowl as I heard the two conspirators comes closer to the room I was in, eventually, finally, opening the door, a muscle gutted red dragon and giant blue fox walking in just to find me laying there. The fox whistled, taking a look at my massive form. "Well you certainly got quite big didn't you little guy?" I glowered at him. "Shut up Gilwal."

He snickered, suddenly stopping as a red hand pushed its self in front of him. "Pay up, he ate everybody." Fier said, staring at the large fox expectantly. Sighing the blue monstrosity pulled a wallet out of his pants and handed over some money. "Yeah yeah, a bet's a bet." He grumbled, putting his wallet back as Fier smirked and just simply shoved the money in his pockets.

"You two bet on what I'd do didn't you..." I asked, not really a question since it was blatantly obvious. "Well of course, had to push you to get bigger SOMEHOW. Pretty obvious you enjoyed it too." Fier replied, walking over and hiving my throbbing, thick member a good thwack, causing me to jump and destroy the wall I was leaning against. "It's not funny you asshole!" I yelled as the dragon snickered, turning away from my flailing self, trying to get back up. "Come on, why don't we get home before you cause any more property damage huh?" I grumbled as I finally righted myself and got on my feet, striding after the two evil doers as the laughed to themselves. "It's not exactly MY fault..."