Simmons loved working in the field with her boyfriend Fitz and their girlfriend Daisy.
But even she had to admit that she and Fitz weren't the most well trained for it, even after several years in the field and trips of varying lengths for each of them to a certain alien planet that shall remain unnamed. And she had without any trouble successfully convinced him to start training on the gun range with her, both the indoor range and the outdoor three-gun range that Coulson had set up off base for agents to train on, but she couldn't for the life of her get him to take up any kind of cardiovascular exercise program to aid in their sprinting away from trouble that they couldn't handle.
Until the afternoon that she was running by herself on one of the treadmills in the Shield gym, which just so happened to be facing directly towards one of the wall mirrors that was set up mostly for anyone lifting weights to 'check out their form' (i.e., look at their muscles), and she took her tank top off because it was way too hot inside the gym that afternoon to be running with it on.
Staring at the reflection of her own sports bra-covered chest bouncing with every step that she took, she finally knew that she had a way to make her boyfriend come run with her.
So as she showered with him after she was done with her run, she said sultrily, "You know, if you come run with me in the gym, I'll be wearing a sports bra, short tights, and absolutely nothing else."
To aid his brain in putting two and two together and coming up with 'boobs', she put her hands underneath the bottom of her breasts and made them bounce up and down, as she looked up at him while biting her lower lip sexily.
"Oh. Oh! Okay, then — I guess I could stand to exercise a little," Fitz replied as he put all of the pieces together in his head.
~FSK~
Daisy walked into the gym the following morning to practice her hand-to-hand, non-quaking combat training.
Where she noticed that two of the treadmills had been rearranged since the previous morning when she had last been in there training with May. Instead of being next to each other facing in the same direction, like the treadmills were normally set up, these two were now facing directly towards each other — a weird configuration for treadmills in her mind, and one that she'd certainly never seen before in their gym.
"Who moved the treadmills like that?" she wondered out loud to herself.
After all, who would want to be staring straight at someone else as they ran? Wouldn't that be really awkward?
As she still stood there half a minute later contemplating the oddity that the pieces of exercise equipment were, and trying to come up with reasons why it might have been done, she heard someone walking into the gym behind her, and turned to see that it was her significant others, FitzSimmons. And more importantly, it was Fitz in running shorts and a tank top, and Simmons in nothing more than a bright yellow sports bra and short spandex tights.
"Oh…" she said, suddenly understanding the new arrangement perfectly as FitzSimmons walked over to the treadmills and stepped on. Addressing her science boyfriend and girlfriend beyond the simple wave and smile that they'd given each other when she'd turned, Daisy said, "I see you finally found a way to make Fitz take up running with you, Jemma. Congratulations."
"Got to do what I got to do," Simmons answered cheerfully to her inhuman girlfriend. "We need to get better in the field, both Fitz and I, and if that takes using the mystical powers my boobs hold over Fitz's male brain, then so be it."
"I agree entirely," Daisy replied, before suddenly smirking. "Just one question, though — can I move the third treadmill over and re-angle them so that they're all facing each other in a kind of three-point star? I like boobs myself, and have an extra pair for Fitz — and you too if you care — to look at while you guys run, you know."
Simmons' mischievous smile was all the answer that Daisy needed.