Alpha fitness

by Genetonic

High school nerd Jeff keeps getting bullied by muscle jock Travis… until he has a lucky encounter with the new ‘Alpha’ brand clothing line.

Waking up to another day, Jeff pulled himself out of bed. His weak frame hunched over in the morning light. Getting dressed, his small shirt still somehow baggy on him. Eating half a banana, Jeff walked to school, the weight of his backpack slowing him down. His unkempt hair fluttered in the breeze as he rushed to get through the door. Two minutes until the bell rang. Turning around to the blasting of a horn, Jeff caught a glimpse of Travis’s truck peel into the parking lot. That dumb jock was always late but nobody dared say anything to him.

Not wanting to run into him, Jeff ran to his first class, mathematics. Having always been a brainy rather than brawny kid, Jeff excelled in math, the sciences, and other academic-forward courses. He tried to enjoy the class, but he could sense the looming of last period, gym. The bane of every unathletic student. It wasn’t Jeff’s fault, he tried several times to put on weight, working out, taking supplements. He couldn’t even put on weight in the heavy sense, he was stuck being the human equivalent of a twig. It wouldn’t be that bad if he wasn’t constantly tormented by Travis and his giggling bimbo of a girlfriend, Stacey.

Much to his chagrin, the bell rang, and he had to go to gym. He had tried to get out of it several times in the past, sometimes successful, more so unsuccessful. By now, the gym teacher had caught on to Jeff’s goals and warned that the next time he missed a class without being in the hospital, he would fail. He tried to get there early so that he could at least change before Travis got there, but even from the hallway, he could hear the jock’s bassy laughter echoing.

Entering the locker rooms, Jeff was met by Travis’s broad shoulders and mountain-like back. The massive jock was blessed with all the pleasantries of nature. He was 6’5”, 320-something pounds, quite hairy for his age, and of course, blessed with oversized manhood. The hulking jock turned around, his bearded face grinning with evil delight.

“Bout time you showed up, little Jeff. I was gonna tell the coach on you, but having you here is that much better.” He grinned and stood in front of Jeff. At only 5’6”, Jeff was staring directly at the monster’s midsection. Looking up at his massive pecs, or down at his bulging package yielded no comfort.

“Hey Jeff, let’s play a game. If I show you my dick and yours is bigger, you live. If not, you die.”

Jeff was frozen. Everyone in the school knew of Travis’s legendary package. There was even a rumor that he only passed the 8th grade cause he boned his English teacher. Even back then he was known for being well hung. Looking Jeff in the eye, Travis peeled off his boxer briefs, his massive package flopping out. Two huge bull nuts, each the size of oranges, stretching out his hairy sack. His thick horsecock, probably 8-9 inches soft, the huge fleshy snake twitching. The massive cockhead flaring larger.

“You fuckin seeing this bro? What you got down there? A thimble? Me, I got 9 fuckin inches of soft horsecock, fuckin 13 inches when it’s rock hard.”

Travis yanked down Jeff’s airy shorts, his 2-inch softie barely visible.

“Bahaha! That’s what you call a cock? This is a real man’s cock.” Holding it in his hand, Travis shook his hardening dick around, the thickening shaft becoming too thick for his palm. “Fuckin need two hands to hold this thing! Fuck, just one of my nuts is bigger than your whole package, if you even call that a package!”

Travis proceeded to peel off his 4XL shirt, his massive muscular pecs bulging out, a heavy dusting of hair covering each one. He flexed his massive guns, each one 26 inches of power.

“This. Is a fuckin’ man. Now fuck off, I gotta go take care of this horsecock.”

Jeff sat down on the bench, his shoulders hunched over. He knew gym was starting and that he was going to have to face the wrath of Coach Davis. He just couldn’t get it out of his mind. He was puny, and Travis was a walking beefcake with a porn star dick and too much testosterone. He just wished he could be more of a man.

After school, Jeff drove to the store to get a new pair of shorts to replace the ones Travis tore. He was looking through the store when he spotted a section he hadn’t seen before, ‘Alpha Fitness’. Walking through, he was taken aback by the pictures of models. Each one looked to be big as Travis, a few even bigger. All of the clothing sizes were bigger than 3XLs, many going all the way up to 8XL. In the undergarment aisle, Jeff was blown away. Each of the models looked like they had stuffed a basketball in their shorts, and the sizes went all the way up to ‘Extra-Enhanced’.

Feeling the excitement from seeing such sizes, Jeff wanted to buy a pair of clothes, just to imagine being that size. He got the smallest he could find, a pair of 3XL shorts, a comfy black sweatshirt, and a size ‘roomy’ pair of boxer briefs.

Going to the changing rooms, Jeff tried on the clothes, his initial excitement dashed by seeing how much the clothes draped over him. He couldn’t even wear the underwear, the huge pair of boxers sliding off his hips, the pouch not even brushing his junk. At least the sweatshirt felt comfy, the fabric was very soft and he felt a strange warmth spread through him when he put it on. The massive collar nearly went over one of his shoulders, and the bottom hem went down to his knees. But it was still comfy, and he thought he would get it for sleeping in.

He started taking it off when he noticed the shirt he was wearing underneath rose to show his abdomen. Normally it hung past his waist by an inch or two, but now it was starting to look like it fit him perfectly. He could feel a wave of excitement wash over him. He put the sweatshirt back on and tried to keep the underwear and shorts from falling off. He sat down for a bit, strolled around the changing room, feeling the tingling warmth spread through him again. Looking in the mirror, he looked taller! While the sweatshirt was still way oversized, it didn’t drape over him as much!

Taking it back off, his original shirt was now too small, the hem now above his belly button! Looking down, he now saw the faintest lines of abs! Taking off the shirt, he flexed his arm and to his delight, a small ball of muscle came up!

Putting his new clothes back on again, Jeff could feel the warmth return even stronger. He could almost see himself start to swell a little bit bigger, a little bit taller. Looking down, he could tell that he had grown a couple of inches, his feet looked farther away, but bigger! Best he could guess, he was now 5’9 and 170 pounds of toned muscle. He kept the clothes on until a new excitement came over him. His dick was now touching the fabric. Dropping his shorts some, he couldn’t believe how much bigger his dick looked. It must’ve been 4 inches soft now! Even his balls looked bigger, approaching the size of ping pong balls!

The warmth returned now even stronger, he could feel his arms gaining mass, his pecs felt bigger, he could flex them now! His abs looked more cut, and his thighs were now big enough to hold the clothes from falling! Looking at himself, he was probably close to 5’11 and 210 pounds now. The clothes still seemed too big for him, but he could tell it wouldn’t last much longer.

The warming tingle returned, only this time he felt a prickling sensation over his body. Looking at himself in the mirror, the first thing he noticed was that his form looked as big as the other jocks at school! He wasn’t even close to Travis, but he looked like he played football for a while. Taking off his form-fitting sweatshirt, he was met by two big pecs, a cobblestone midsection, and most delicious of all, body hair! He was sprouting a noticeable treasure trail and even had a faint dusting on his chest. His armpit hair was thicker and his pubes were starting to bush out more. Speaking of, his dick looked much bigger now, probably 7 inches soft. It now hung over his tennis ball nuts and looked thick as a can of red bull.

Checking himself in the mirror again, he looked like he fit the clothes perfectly, his bulky upper chest pushed out against the fabric perfectly, his thighs and bulging package were starting to stretch out his shorts. He guessed himself to be around 6’2 and 280 pounds.

Going back into the aisle, he grabbed a 5XL sleeveless sweatshirt that said ‘Most Muscular’. He picked out a 5XL pair of grey sweatpants with an extra roomy crotch and a logo of a well-endowed guy sporting a massive dickprint. He also saw a pair of workboots with the slogan ‘Real men work outdoors’, the logo had a seriously ripped lumberjack with a thick beard and a forest of chest hair. Lastly, he picked out a pair of ‘enhanced’ boxer briefs. Returning to the changing room, he quickly changed into all the new clothes, taking a moment to admire the naked hunk he’d become.

Strolling with his longer gait, Jeff finally felt the warmth return. He watched as his body stretched a little taller, his muscles bulking larger as he grew. He could feel his extra-sensitive cockhead brush past the fabric as it grew longer. His face prickled, soon sporting sideburns, then a shaggy beard, and finally, a thick beard that grew longer as he grew taller. His chest felt similarly itchy as he could feel long brown hairs cover his growing pecs. He saw as his engorged biceps ballooned bigger, soon surpassing 28 inches. By the time he looked in the mirror, he nearly came.

Staring back at him, he must’ve been 6’7, 380 pounds. His lantern jaw sported a thick brown beard, his telephone-pole thick neck had stubble going down to his massive chest. His pecs sprouted a carpet of brown hair that pushed out the collar. His sleeveless sweatshirt exposed his broad shoulders, his massive guns flexing at him. His engorged forearms were covered in silky brown hair. Down below, his cobbled abs and thick treasure trail leading to his skin-tight sweatpants. His thickening pubes started to pour over the waistband. His tree-trunk thighs stretching out the fabric, pulling it taut over his massive dickprint. His shaft was as thick as a wine bottle, easily a foot soft. His massive bull nuts looked to be the size of cantaloupes. The massive weight of his package pulling the waistband down further to reveal the base of his thick cock and huge bush. His work boots felt tight, unlacing them as he allowed his huge dogs to grow out more, he could feel his toes stretch wider.

Returning to the aisle, he garnered looks from everyone else. Now tall above the shelves, his massive bearded face and enormous frame demanding attention. Not to mention the huge dickprint he was now sporting. He searched the racks, pulling out a huge 8XL tank top with the words ‘ALPHA’ written across the front. He found a pair of pants that could fit four men. On the bottom shelf, a pair of work boots, size 24 with a logo that just said ‘BEAST’ on them. And lastly, a huge pair of nylon boxer briefs, ‘Extra enhanced alpha junk only’ written on the tag, the massive neon waistband saying ‘ALPHA’ on it, the enormous pouch billowing like a garbage bag.

His heartbeat racing, Jeff returned to the changing room. His enlarged size was already tight in the cramped space. He quickly changed into all the new clothes. Expecting the ensuing growth, he returned to the aisles. Unfortunately, there wasn’t a mirror, but he could feel the growth. His massive feet stretched to fit into the supersize boots, his massive toes getting crunched by the steel toe. His calves ballooned, bigger than watermelons. His thighs surpassed redwoods as they swelled thicker. He had to alter his stance to accommodate their width. His cobblestone abs enlarged, cutting deeper, his massive obliques bulging out. His enormous pecs ballooned out, swelling past the size of king pillows, stretching his tank top to the limit. The straps cut deep into his engorging traps, they rose up to his ears. His shoulders broadened, probably 7 feet across. His biceps swelled up bigger than watermelons, their pumped size making it so his arms went out at a 45-degree angle. His massive forearms and hands swelled bigger, his grip strengthening. His limbs were covered in thick hair, the fur spreading and thickening on his midsection. His ballooned chest sprouted a shag carpet of brown fur, his sensitive nipples poking into the fabric.

Down below, his already massive package swelled bigger and bigger. His alpha junk was ballooning longer and thicker. His bull nuts swelled to the size of pumpkins, their huge weight stretching out his sack, their contents sloshing audibly. He had to step back to accommodate their growing size. They swelled bigger, each the size of a beach ball, their massive size soon too much for his sweatpants. The fabric tore off, leaving his accommodating pouch. His enormous horsecock swelled bigger and bigger. Too big to be considered a whale cock. The enormous shaft was now 5 feet soft, his massive cockhead big as a pumpkin, constantly leaking a stream of pre. Unleashing his enormous cock, Jeff stroked it, the massive shaft between his giant pecs. At the sight of everyone watching him, he exploded load after a load of his hot cum all over the store.

The next morning, Jeff walked to school, still wearing his tank top and pouch. Passersby, cars, even a bus seemed to stop and stare at him. He arrived at school and waited in the parking lot. His former classmates were staring at him from the windows. Right on time for his usual tardiness, Travis pulled in. Stopping his truck with one of his massive feet, Jeff pulled Travis out and onto the ground. The originally massive man paled in comparison to the now 8-foot tall alpha beast, currently weighing in at over 750 pounds of beef.

“What’s the matter, Travis?” Jeff chuckled in his thunderous bass. “You wanna play a game?”

Without waiting for an answer, Jeff tore off Travis’s sweatpants, his thick cock flopping out.

“Aw, that’s cute Travis. But do you want to see what a real man looks like?”

Jeff proceeded to tear off his pouch, releasing his swollen nuts and whale cock.

“Haven’t really measured it, but I’m willing to bet it’s bigger than yours.”

Travis was frozen on the ground. Running over to Jeff, Travis’s girlfriend Stacey tried to encircle her hands around Jeff’s muscles, feeling his biceps. Finally, she tried, in vain, to stroke his massive cock. On cue, it stiffened up to its massive length of 8 feet, as long as he was tall. An involuntary squeal came from Stacey as she went to service his awaiting cock. Jeff looked down on Travis, a wicked grin spreading across his face at the horror in his eyes. Brought back by the growing climax at the base of his cock, Jeff shot gallon after gallon of cum into the air, his alpha seed raining down around them.

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