Grace Bundy, 28, has a unique relationship with the floor. Growing up naturally tall and bendy (which she would later learn at 19 was a manifestation of Ehlers Danlos syndrome ), she was enrolled by her parents in competitive gymnastics. She spent countless hours bending her body to the floor's demands in order to defy gravity and land impressive tricks.

But at 13, her relationship with the floor changed. "I just started having these issues with fainting upon standing," she tells PS. "Being a gymnast, not being able to stand — it's kind of an issue.

" When Grace's parents took her to get checked out by a doctor, she was diagnosed with vasovagal syncope, which is essentially fainting caused by certain triggers like seeing blood or experiencing emotional distress. "They kind of just told me to clench your core and bear down if you feel like you're gonna faint," she says. Grace spent the next seven years dealing with unexplainable fainting, seizures (which she would later learn was epilepsy ), and symptoms of Ehlers Danlos syndrome, including extreme hypermobility to the point of injury.

It wasn't until Grace went to college that she was unknowingly treated for POTS. During her sophomore year of college, Grace went to see a university physician because her fainting had become more frequent. "They gave me salt tablets, and they made me really ill.

So they took me off those, and they put me on what I now know were beta blockers," Grace says. "But at the time, they just told me it.