Umi and Fran stood outside the door to the weight room. Umi lifted her t-shirt and Fran grabbed the top of her girdle, pulling on it and testing the tension.
"That seems good." Fran said. "Don't want it too tight, it'll cut off circulation."
"Yeah." Umi nodded. She let her shirt down and swiveled her hips back and forth. "My dick doesn't move at all. This is kind of nice."
"Good." Fran was wearing her workout clothes, which consisted of a sleeveless, wafer thin top stretched tightly around her breasts, going down barely past her nipples, athletic shorts that went to her mid-thigh, and shoes. The tip of her cock was hanging out of the left leg of her shorts. She stood with her hands on her hips, looking Umi over. "That's nice breathable material, too."
"I borrowed it from my mom."
"Is she pretty big?"
"Yes, almost as big as me."
"Mm." Fran mumbled, imagining the things she could do with two Umi sized dicks. "Oh, one more thing."
Fran pulled a small band out of her pocket and put it between her teeth. She leaned over Umi, putting Umi's face right in her abs. She gently pressed Umi's head into her has she gathered up her hair, pulled the band out of her mouth, and tied Umi's hair into a quick ponytail.
"There you go. Ready?"
Umi nodded as she felt her hair. She was not used to having anything done to it, but the feeling of cool air hitting the back of her neck was kind of nice. Fran pushed against the door, holding it open. Umi stepped inside the workout room, and her jaw dropped.
The last time she was in the workout room, it was because two girls took her there so they could haze her since the room was empty the first few days of school. Now that school was in full swing, the workout room was a paradise. The amount of fit, muscular girls walking around and working out almost made Umi's heart stop. Hard bodies with beautiful abs, forearms as veiny as their cocks, and rippling back muscles, and they all barely wore anything as they flexed and stretched. Some of them were even working out completely naked.
"Woah..." Umi was glad she blew her load during lunch, otherwise she would have been far too erect to function.
"Busy today." Fran said as she stepped in the room behind Umi.
Umi could only nod, her eyes glancing at Fran's abs right next to her, then back to the room.
"If you work hard enough, you can start looking like them." Fran said as she noticed Umi's eyes bugging out of her head.
"I don't know about that..." Umi patted her girdle wrapped dick pressing into her belly. Her belly was flat and she was thin and petite, but she was also soft with no real muscle tone. She certainly would not mind having a set of her own abs to play with, but she was getting ahead of herself. It would take a lot of time and effort to reach that point, and she certainly did not have the genetics to look anything like Fran.
"We'll see. You said you worked out before?" Fran asked.
"Only a couple of times." Umi replied as she looked up at Fran. "My dad and my sister work out a lot, so I kind of know the basics."
"Alright. Let's start with cardio." Fran and Umi walked over to a line of treadmills by the windows, taking two next to each other. Fran started it right up, hit a button, and was immediately moving, already going into her routine.
Umi looked over the machine, set it at a fairly slow speed, and started moving. Her feet pounded the tread as she picked up the pace bit by bit. She looked up out the windows which had a nice view of the sports fields below. On one of them, a row of students, who Umi could only presume was one of the school's fuck teams, were partnered up. One partner was on all fours with her ass in the air and the other was behind her, pounding away as they practiced their thrusts.
For a moment, Umi caught her reflection in the window. She smiled to herself, feeling giddy when she noticed her hair looked exactly like Fran's. She also realized she wanted to see Fran with her hair down. Fran always kept her beautiful auburn hair in a ponytail, not that Umi minded, but she also wanted to see it flow freely.
"You only need to get your heart rate up, you don't need to go too hard." Fran said.
"Okay." Umi replied, realizing she was almost sprinting in her excitement. She slowed it back down, but was soon having a different problem. She was not having difficulty with breathing, and even moving fairly fast she could keep up. The issue was her legs could not keep up. After a few minutes of running they were really starting to hurt, and she was barely even sweating yet.
Umi slowed her pace again, fighting through the soreness and keeping at it. After a while, Fran slowed down, walked for a bit, then stopped. She was lightly sweating and breathing a bit faster than usual.
"How are you doing?" Fran asked, turning to Umi.
"Hnnnn..." Umi groaned. "It hurts..."
Fran looked Umi over, who was stumbling along just above walking speed. She had been running most of the time, though she really slowed down, and was barely sweating. Yet, her legs were shaking and she could not even walk correctly. Fran reached over and shut off her machine.
"You okay?" Fran asked.
"Yes." Umi nodded, slightly out of breath. She leaned over, massaging her shins. "My shins feel prickly."
"Huh." Fran mumbled. She thought about it for a moment, and as her eyes drifted towards Umi's cock, it hit her. Umi had a small body and a massive dick. Keeping that mass of meat fully erect would require her to have good circulation and a pretty good cardiovascular system.
"Feeling out of breath at all?" Fran asked.
"Kind of." Umi said, taking a deep breath.
"You ever feel tired or anything when your erect?" Fran asked.
Umi was confused by the question, but thought about it for a moment.
"No, not really." Umi replied.
"Hm." Fran nodded. If Umi's cardiovascular system could handle her being erect, a little bit of running was probably nothing for it. "Let's go do some core stuff."
Umi nodded and stumbled off the treadmill. They walked towards some mats on the ground, Fran behind Umi to make sure she did not trip. The moment they touched the mat, Umi happily fell onto it.
"Oof." Umi breathed a sigh of relief. "My legs..."
"Here, try this." Fran said as she laid down on her back.
Fran showed Umi a variety of core workouts. Due to Umi's dick size, crunches and sit ups were a bit difficult, but she liked planking. She spread herself out, planking up on her toes and forearms. Her body shook and trembled as she felt the strain, holding herself as long as she could until she collapsed. Now that she was working her full body, she was really starting to sweat.
She looked over at Fran who was doing the same thing and was in awe. Fran was planking in perfect form without the tiniest bit of movement. As she held her plank, most of her muscles were contracted. Shoulders, back, core, butt, thighs, everything was flexed enough to show of an incredible amount of definition, and Umi was enamored by her absolutely stunning body.
"Wow..." Umi mumbled.
Fran glanced over and smirked to herself.
"Do another set."
Umi took a deep breath.
"I'll try. I'm already sore from just that."
"That's the best time to keep going."
