If you're anything like us, exercising is the absolute last thing you want to do when you're on your period.
Sit on the sofa and eat tasty things? Yes. Watch comfy TV shows you've seen 322 times? Big yes. Smash out a HIIT class? Hard no.
Not once have we ever connected monthly bleeding to anything else other than uncomfy, just-gotta-get-through-it feelings.
But here's the thing: Not only can exercising during your period help ease annoying symptoms (hey stabby period pain), but it could also actually help you score that PB.
According to science, women are stronger, more motivated, and more of a bad a$$ when they're menstruating.
Watch: If your period was a person... Post continues below.
But exactly how does your period affect your physical endeavours? And why isn't this something we didn't already know?
All good questions.
We spoke to a doctor, a personal trainer, and a sports nutritionist and asked them everything we need to know about the way our menstrual cycle affects our energy levels, and how we can use it to our advantage.
The relationship between exercise and your period.
Up until now, there's pretty much been a gaping lack of evidence in relation to menstruation and physical exercise. In fact, menstruation, in general, is still quite an understudied area.
"For a very long time, women were actually excluded from a lot of research, because we were too dangerous - for example, in case we're pregnant and it hurts the fetus. We're so dynamic because of our hormones, so it's a lot harder to do clinical testing," said naturopath and sports nutritionist Kira Sutherland from Uberhealth.
"We are kind of three or four different people, depending on when you're testing during the month. You can have different results when you test a female a week into her cycle versus three weeks into her cycle," said Sutherland.