Male boxers start out about eight years of age and their career lasts an average 20 years, fighting about five or six times a year. National men's champions can earn at least US$765 a fight.
For women, the stakes are much lower: The total prize money for the inaugural Queen's Cup women's tournament in 2004 was US$250. They fight an average of just three times a year.
Pariyakorn believes women fighters should be able to find a career in the ring that would help support their families back home.
She hopes to begin that change with a new series of women's fights to be held every three months, starting with a tournament next month to coincide with International Women's Day on March 8, which she hopes will be broadcast on cable television.
But tonight she is working with men, in another one of the crowded, messy and smelly stadiums where it feels like she has spent her whole life.
She's used to the pungent smells of oils and creams applied to warm up muscles.
"Women don't like the smell and it stains shirts," she says from inside a locker room, showing her company's new brand of herbal oil she hopes women fighters will take to using.
In muay Thai, each fight lasts around 25 minutes, broken into five rounds of three minutes each,
followed by two-minute breaks, when fighters return to their corners to sit on small stools inside large metal trays.
These catch their sweat, spit and water as their managers pour drink bottles over their heads and rinse their mouth guards.
When the fight is over, Pariyakorn's father will present the prizes to winners.
Even though she's not allowed in the ring, she walks purposefully through the stadium amid the commotion as young fighters are rubbed down, their hands taped by trainers and gloves forced on.
She disappears into crowds of Thais and puzzled foreign tourists who clutch tickets and stand at attention as the royal anthem plays.
Then two boys spring into the ring, perform traditional bowing rituals, and ready for the first bout of the night.
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