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Working Up A Sweat

By manonthemoon

Commission for Max_O-Zuma (FurAffinity)

CONTAINS: F solo, muscle growth, breast expansion, ass expansion, hourglass expansion, macro, masturbation, and destruction.

* * * * *

Magndis sat hunched over her old, tankish computer, lazily poking the keys with the fingers of her left hand and propping her head up with her other hand. The beige tower whirred and sputtered, showing symptoms of overdue repair. The snow wolf perked her head in explosive enthusiasm at the sound of a clanging weight. She peered through the window of her office to the dimly lit gym floor, where a stout but bulky snow leopard, the last person in the gym, sat up on the bench press and panted excessively. Magndis' eyes were unblinking, and her breath was still. As she saw him lay back on the press again, she sighed, grumbling to herself and leaning back in her custom-built swivel chair, her 7-foot frame forcing the creaking plastic at an obtuse angle.

Her cardboard box of office was too cramped to spin her chair around, and the thought of typing up any more expense reports for the gym was repulsive. The wolf tried remembering a song she heard on the radio the other day, one with the blitzkrieg synth melody and a bass like a T-rex. She could only hum a few bars before she lost it and gave up in frustration. Her sturdy leg jittered restlessly, her eyes crystal blue eyes darted around every corner of the room, and her nails tapped unconsciously on the desk. If Magndis had to listen to her breathing for one more minute, she would lose her mind.

Her pointed ears flicked as they heard another clang. She turned to the window and parted her silvery bangs from her face. The snow leopard draped his gym back over his shoulder and wiped the sweat from his forehead with a broad stroke. In that instant, Magndis became a wide-eyed pip, her bushy white tail swishing wildly, brushing against the back wall of her office.

"See ya tomorrow, Magndis!" the bodybuilder called as he strolled towards the exit. He pushed through the glass doors, passed under the amber streetlight, and disappeared into the darkness as he crossed the street.

The towering winter wolf skittishly poked her head from around the corner, and her gaze bounced across the gym floor, scanning for stragglers. None to be seen. Her tail swayed even faster.

Magndis bolted around the painted-white brick wall and homed in underneath the standing low cable crossover. Her heart was an over-wound jack-in-the-box, but before she partook in her favorite hobby, the statuesque she-wolf emptied all the air in her lungs with a drawn exhale. As she pulled her elbow above her head and stretched the thick fibers of her tricep, she muttered to herself, "Just a few sets, just a few sets." After adjusting her purple strapless sports bra, causing her plump breasts to bounce, she cracked her knuckles and bent down to reach for the handles of both the cables. As she rose to her feet, the taut cables yanked on her arms, which Magndis always thought was the most exhilarating feeling before a workout. With another lengthy exhale, Magndis lunged forward and raised her arms to chest-level, hauling the cables.

They tugged on her arms, unwilling to budge, but the wolf's raw power proved too great. The pulley mechanism suspended the back-breaking weights, and Magndis could feel their mass try to drag her arms down, burning her biceps. The wolf, however, merely smirked at the challenge. She gently lowered her arms, lowering the weights as well into a neat stack. The wolf promptly raised her arms again, huffing as the weights fought against her. The heat from her limbs traveled up her elbows and made her shoulders twitch, but Magnids continued on, rep after rep, inhale after exhale. Magndis shut her eyes, trying to ignore the layer of sweat building underneath her snow white fur and her shortness of breath.

As the heat of her fatigue intensified, she did not notice the energy radiating from the red stripes on her arms. With every rep, the glow coiled up her biceps, down her deltoids, and around her neck. It was as if someone opened the doors of the gym and let in a gust of cool air inside. Magndis sighed, relieved of the fire that blanketed her body. The tension in her muscles soon melted away, and the weights suddenly felt lighter. I must really be getting a pump going, she thought. With her newfound vigor, Magndis operated like a machine, thrusting her arms forward and lifting the weights up and down in rapid succession.

All the while, the markings on the edges of her six-pack as well as the designs on her thighs began to glow a vibrant red. Magndis' biceps, unbeknownst to her, started to pump with each thrust, swelling incrementally with more and more mass. Her thighs twitched as her quadriceps filled out bit-by-bit, and as the bands on her legs illuminated, her calves underwent the same phenomenon. "Oh yeah, baby," she said under her breath. "Keep it coming." Her already tantalizing cleavage deepened and lengthened as inch by inch of her ample chest peeked from the confines of her sports wear and pushed against the fabric, her nipples demanding to be seen. Even her height was gradually increasing from 7'2" then 7'5", 7'8", 7"11. Every passing second made her arms and legs swell and round with raw strength, transforming her into the buffest, tallest female body builder ever known, and her clothes struggled to stay on.

With another violent thrust, the weights slammed the top of the pulley mechanism, and the cable snapped, crashing the pile of weights on top of each other and sliding onto the floor. Magndis froze, eyes wide as her mind rebooted from the inexplicable destruction. Within a few seconds, her eyes locked onto her arms, which bulged with tightly packed muscle. "God, I really did get a pump going," she said, flexing on instinct and tensing her bicep into an orb of power the size of her head. She then inspected her lower half, the thighs that thickened into sturdy columns. However, the soft tit flesh that threatened to spill out of her top obscured most of her vision. "W-wow. They got bigger than usual." As she gently squeezed the malleable plushness, she experienced a sudden jolt to her womanhood, and she squeaked. "And more sensitive." Once she was done eying herself up, she spotted the broken cable sprawled on the ground, and an inkling of guilt sat in her stomach. "Damn. I gotta get another crossover. Maybe I should just call it a night."

Magndis spun around and gasped as her tight-fitting bottoms dug between her feminine lips. Her arms were stiff at her sides as pulses of pleasure tingled from between her legs to her muscles. After a few deep breaths, she was able to slowly relax, and her eyes wandered from the exit to a barbell in the middle of the gym floor. Her heart fluttered just thinking about lifting it over her head. She bit her finger at the thought of feeling the rush again, letting pounds upon pounds of mass flood to her arms and fill her with unbridled strength. "Well," she meekly muttered, "as long as I don't ruin anymore equipment, I should be good for another couple sets."

With careful, tiny steps, the 8-foot she-wolf crept towards the barbell, her round ass and thighs clenching from the mind-numbing sparks of lust from her steamy womanhood. She slid weight after weight onto the handle, piling them on top of each other until the barbell weighed upwards of 1,000 pounds. She wrapped her fingers around the cool chrome and breathed out, relieving the twitch of anticipation. Then with a grunt, Magndis heaved, teeth closed shut and the muscles of her neck bulging. She only managed to lift it an inch or two off the ground, but she persisted regardless, tightening her grip. The wolf shut her eyes and growled, letting the ferocity of her species show, and she cleared her mind of everything but the image of her climbing upwards, filling the blackness with her throbbing muscles, her long, beefy legs, her unfathomable tits.

She then felt a familiar chill ripple through her body, and the markings on her forearms glowed violently, a river of red traveling up towards her shoulders. "Yesss... Just like that..." Her biceps were the first to push outward, nearing watermelon-size and growing beyond that, and her shoulders rose to the size of beach balls. Magndis felt as if the hefty barbell was suddenly lighter, gradually lifting it away from the floor past her shins then her knees. The wolf swelled in size beyond 8'5", and within 10 seconds, Magndis was past 9 feet and moving towards 10. Her grimace turned into a gleeful smile as she felt her fat nipples rub against the stretchy fabric of her top. "Th-th-that's it, girls. Bigger... Even bigger..." Her breasts rivaled the size of her biceps in immensity but soon outgrew them, each supple, plentiful, and half the size of a car.

The she-wolf hoisted the barbell from a dead hang to chest level, her swelling flesh pressing against the handle, and with another swift motion, Magndis roared and lifted the barbell above her head. She exploded with size from her swelling neck and god-like arms to her shapely thighs and calves, pushing 12 feet then 14 then 17 in a matter of seconds. "More... G-give me more..." Her hips blossomed outward, outshining the curviest of models, and her ass inflated to jaw-dropping proportions, her bottoms now floss between her crack. Her sports bra was a thin band covering a fraction of her dinner plate nipples, refusing to snap with her womanly flesh bending around the material. Upward and upwards she climbed, a towering titaness with no limit to her power.

She released the barbell, and the weights cratered the gym floor. The she-wolf triumphantly raised her hulking arms and even kissed one of her unbelievable biceps. "I need more of a challenge," she panted. "A lot more." After pulling the barbell out of the dents in the floor with one hand, the huge winter wolf dragged more weights and slipped them on, piling on 100 lbs. ring after 100 lbs. ring. Magndis eagerly grasped the handle palm-up and yanked it upwards, hovering it under her immense chest. Baring her fangs in a grin, Magndis curled the barbell up one rep after another, huffing and grunting with each one. Her elbows started to burn, but she pressed onwards, never losing a beat. "C'mon, baby. Work the magic." And on cue, her arms began to radiate. "That's it... Mmmmmm..." Every curl pumped her frame with added mass and shivers of warmth. Magndis inched higher and higher, her head nearing the metal girders of the ceiling. The barbell bumped against the bottom of her expanding breasts, causing them to jiggle and making her coo with delight. Her sports bra dug into her all-encompassing pillows, a string against her massive frame, and her bottoms were lost in the ever-growing vastness of her rump, her hips venturing to goddess levels of voluptuousness. "Mmmmn... Don't stop. I need more..." Her epic arms and mighty legs bloated with unstoppable muscle, and her ears flinched as they poked the icy metal of the ceiling. Her head was next, followed by the back of her neck. The barbell, which shrunk in her grasp, was then switched to her right hand as she effortlessly finished her set.

"Twenty-three, twenty-four, twenty-five!" The sports bra and her bottoms finally succumbed to the pressure, snapping and freeing her generous curvaceousness. The winter wolf, over 22-feet tall, relinquished the miniature barbell and let it crash to the floor again, cracking the wood paneling. She scanned the gym and grinned at the equipment, child's toys at her feet. "Yes!" she exclaimed, flexing her tremendous arms. "I'm so huge! So powerful!" She grabbed two handfuls of billowy breast flesh and quivered. "So sexy. I'm so... s-so... O-oh god..."

The towering she-wolf gently bucked her hips, now a slave to the beckoning furnace between her thighs. Panting and clenching her jaw, Magndis slid a hand down the curve of her waist and against her rigid six-pack towards her pulsating pussy. Wasting no time, the hot and bothered she-wolf traced the edges of her lips with her fingers, sighing and shaking uncontrollably, before rubbing her needy clit with tiny circles. "O-o-oh..." she stuttered, slamming her cushiony rump on the floor. Magndis melted as she felt blanketed with warmth and caressed by a thousand sensual hands. Before long, the markings covering her body radiated once more. "That's right. Give it to me. I need it. I... Nnnggg..." As she delicately fondled her womanhood, she began to surge upward at an alarming rate. Her back brushed up against the wall as she passed 26 feet then 27 feet the next second and 28 after that. Her nipples demanded her attention, and there was no way she could disobey. With her spare hand, Magndis cupped one of her enormous melons and rubbed the nipple with her thumb, trembling as her nerves were overloaded with wave after wave of shocking passion. Forty feet became 42 then 44, and the she-wolf's head brushed against the ceiling again. "M-moooore..." she mumbled, her face being pushed between the pillows that encompassed half her body weight. "Mooooooore...."

Her hardworking fingers slipped inside her leaking pussy, and she gasped, paralyzed, but her fingers had a will of their own and ventured deeper within Magndis. They stirred around and massaged her upper wall, fueling her growth. She brushed circles around her nipple furiously and tried to maintain her hold on her ever-increasing tit. The bottom of her feet pressed against the opposite wall, and she bent her knee to accommodate, but her knee was nearing the ceiling as well. "Moooooore... Bigger... Please..."

The sound of stressed metal reached her ears.

"Oh, yes... Keep going..."

The rafters bent against her mass, and the roof was starting to give. Magndis' tail wagged, knocking over countless weight stations and equipment.

"Give me all of it!" she commanded. "Make me gigantic! Make me massive!"

There was no more room left. Magndis smiled as she was smothered by her own breasts and felt the whole gym shake around her.

"Make... me... BIGGGGGGEEERRRR!!" The winter wolf exploded from the roof of the gym as she was swept away in the current of her tidal wave orgasm. Her height skyrocketed exponentially, her feet breaking through and demolishing the wall facing the street. The back wall crumbled shortly after, flattened by her engorging ass. Her cries and moans of joy and ecstasy rang down every city street and avenue. Neighbors flicked on their lights and bolted to their terraces to witness a busty, musclebound vixen ascend past 100 feet and continue to grow. A lake of juices spread to the street, and Magndis rotated her hips relentlessly, cashing in on every pent up desire, savoring every second of hot, pounding lust erupting from her divine form.

At the summit of her pleasure, Magndis panted, tongue hanging from her maw, now 200 feet of powerful, curvy woman. The onlookers were still trying to pry their jaws from the ground. "That should be good for now," she sighed. "I'll worry about repairs later. I could go for a rest."

The End.