But for people who suffer from Postural Orthostatic Tachycardia Syndrome, commonly known as POTS, these simple actions can be a daily struggle.

The syndrome is a condition that affects blood flow.

Symptoms of POTS can include lightheadedness, fainting and an uncomfortable, rapid increase in heartbeat.

East Maitland's Haylee Penfold, 22, has lived with this condition since she was diagnosed in high school.

"It's different every day," she said.

"I started feeling under the weather when I was in Year 10. I would go to the doctors about it and they would tell me that it's normal and I probably had low blood pressure but I kept getting worse and worse.

"I then started passing out at school but the doctors kept saying it was normal. I finally got diagnosed in Year 11."

The symptoms of the syndrome vary but on her worst days, Ms Penfold has to rely on a wheelchair.

But rather than sit back, Ms Penfold has stepped up - quite literally - to raise awareness and funds for POTS.

The 2021 POTS Walk, which runs for the month of September, aims to raise awareness about postural orthostatic tachycardia syndrome (POTS) and raise funds for Dysautonomia International's POTS Research Fund.

"I became interested in advocating about it ... research in Australia is really minimal," she said.

"There's no real treatment plan for everyone. I've been on heaps of different medications."

A number of Ms Penfold's friends have come onboard for the fundraiser.

The team's goal is $2000.

"I'm just over half to my goal which is exciting ... I'm doing what I can when I feel well enough," Ms Penfol said.

But Ms Penfold also wants to encourage young people to advocate for their own health.

"The main thing I want to share is that if young people like me feel like there's something wrong with their body ... keep fighting," Ms Penfold said.

"If you feel like you're not well and being told 'you're fine', keep pushing."

People can donate by visiting dysautonomiainternational.salsalabs.org/2021potswalk/t/hayleesteam/index.html.