The Treadmill; never skip Leg Day!

"Let's do the treadmill," Mary Jane finally said. "That way I feel like I can actually match you."

"Come on, don't be like that," Peter teased, bumping his shoulder into hers. "We could always find some spider to bite you..."

"No thanks," Mary Jane said quickly, but she smiled all the same. Neither mentioned how that brief contact made a flood of old memories... and deep desires... flare up in their veins. Instead the two picked out two treadmills and set them up before going into a light jog.

The gym was rather nice, if empty due to it being brand new. As such there was no one around the pair, not even any trainers. If there had been perhaps they would have noticed the transformation happening to Peter and Mary Jane. With every step their took their legs began to change. First any fat that might have remained on them calves and thighs disappeared, leaving only lean muscle. Not that the two had much in the way of fat but after about 5 minutes of steady running they were now at 0% body fat anywhere below the waist.

"You mind if we crack it up?" Peter asked.

"I was going to suggest that!" Mary Jane said happily. "I feel like I could do a marathon!" Peter dialed his treadmill to double the speed they'd been at, Mary Jane matching him... and Venom happily beginning the true work, flooding their muscles with his form.

Every time their feet slammed down their muscles puffed out. Their thighs thickened, growing wider until the shorts the two were wearing were cutting into their skin, not they noticed. Their calves bulged with muscles, veins turning dark as Venom forced more of himself into their lower bodies, sculpting their muscles. Peter and Mary Jane both, without thinking increased the speed to max, racing on the treadmills but able to handle it easily as their legs became far more defined. Their ankles strengthened to handle the constant movement and their feet swelled, growing wider and longer to help them balance.

It was this that finally made Peter and MJ stop, slowing down due the the slight throbbing pain in their feet