Strong Like a Diamond: How Hasina Rahman Built a Martial Arts Space Just for Women

A Gap Worth Filling

When Hasina Rahman moved to Luton, she went looking for somewhere to train. What she found instead was a gap.

There was fitness on offer in the area, and there was martial arts too, but nowhere brought the two together specifically for women. There was no female-only space where she could train and teach on her own terms, let alone build something around her own family at the same time. So she built it herself.

"Martial arts isn't just about physical strength. It's about helping you mentally, physically and emotionally," she says.

That belief sits at the centre of Pink Diamond Martial Arts, the academy Hasina founded in 2015. What started as a response to a gap in her local area has grown into a community of over a hundred students, built on the idea that confidence is something you can train just as deliberately as a punch or a kick.

Finding Her Fight

Hasina's relationship with martial arts goes back further than the business does. She started karate at fifteen, at a point in her life when confidence was in short supply. She had been bullied at school, and it had taken its toll.

"As soon as I went in there I was like, yes, this is what I want to do," she says.

She stayed with it. Karate became kickboxing, then Muay Thai, then MMA, and somewhere along the way a second Dan black belt. For years it sat alongside a full-time office job, a passion squeezed into evenings and weekends rather than a career in its own right.

Everything shifted when she got married and had her children. Somewhere in the early days of motherhood, she felt the pull to build something of her own. 

"I wanted to do something for myself and base it around the children as well," she says.

That instinct became Pink Diamond Martial Arts. 

Five People and a Lot of Doubt

Breaking into martial arts as a woman, in an industry still dominated by men, came with a particular kind of resistance. Hasina remembers the comments that followed her when she first arrived in Luton, where nobody knew her name or her record. People assumed she had bought her credentials rather than earned them.

"Because it's a male-dominated sport, for you to be known in that area as a woman is so hard," she says.

The comments got into her head, the way comments do, and she started questioning whether she was good enough to run her own club at all. It was someone close to her who pushed back, telling her that if martial arts was something she truly believed in, she had to stop listening to everyone else and simply start.

"That's one of the best pieces of advice I got: just do it," she says.

So she did. Her first class had five people in it, despite advertising everywhere she could think of. It was a disheartening start, the kind that could easily have been the end of the story too, but Hasina kept going. She learnt along the way that the people offering advice rarely had her experience or her instincts, and that the only person who really knew what Pink Diamond should be was her.

"At the end of the day you're the one with the experience, you're the one with the knowledge. You have to listen to yourself," she says.

Eleven years on, that first class of five has grown into a community of more than a hundred students.

Watching Them Grow Up

When you ask Hasina what has meant the most over the years, she points to the students.

Some of the girls who walked through her doors back in 2015 and 2016 were seven or eight years old at the time. They are eighteen and nineteen now, and several have gone on to become instructors themselves, leading their own classes as part of a new initiative she calls Mini Diamonds.

"For me it's like a child, you know, growing up, seeing them become this amazing woman. That kind of reward is something so special and different," she says.

There is something in watching that arc play out, from a shy child learning to spar to a young woman confident enough to lead a room, that Hasina describes as unlike anything else the business has given her. 

Trusting Her Own Instincts

Looking back, Hasina is honest about what she would have done differently. She would have trusted herself sooner.

She had three black belts and years of experience across multiple disciplines by the time she opened Pink Diamond, and still found herself second-guessing decisions. Hasina was trying to shape the business around what she thought other people wanted rather than what she knew to be right.

"The one thing I wish I did more of was listen to my own instincts and not think how can I please other people, how can I do it better for them," she says.

It is advice she now passes on without hesitation. Trying to please everyone, she says, is the surest way to please no one. The brand, the way she teaches, the standards she holds, all of it has to come from her own conviction. If that is strong enough, the right people will turn up.

Her old karate instructor once told her something that has stayed with her ever since. You can be the best fighter in the world, he said, or you can be the best coach, but rarely both, because each one demands a different kind of time and focus. Hasina chose coaching. She chose to build the next generation rather than chase her own fighting career, and that choice now shapes everything Pink Diamond does.

A Space Built for Women, By a Woman

Hasina trained for years in mixed classes, often as one of only two women in a room full of men. She understands, from direct experience, what it feels like to walk into a male-dominated space and quietly recalibrate your confidence to match it.

Pink Diamond was built to remove that recalibration entirely.

"It's not just about race or religion. It's for any woman that wants to come and learn in a safe space," she says.

She is candid about the difference in physical strength between men and women, and sees no use in pretending it does not exist. What she has built instead is a space where that difference is irrelevant to whether someone belongs. Women train, spar, and build skill on their own terms, without needing to brace for an unfamiliar room.

The comments have not entirely gone away. People still tell her she does not look like a fighter, whatever that is supposed to mean, or remind her that she will never be as strong as a man, as though strength was ever the point. Hasina's response has settled into something close to amusement.

"You're always going to get negatives, and you just have to learn to use it as fuel to drive you to do even more amazing things," she says.

Martial arts, she is careful to explain, was never about beating anyone. It is about skill, about composure under pressure, and above all, about knowing that you have the skill if you ever genuinely need it, but running is always the first and best form of self-defence. The fighting comes a distant second.

More Than a Gym

Confidence does not just happen on the mats at Pink Diamond, Hasina makes a deliberate effort to build it outside of the ring. She encourages students onto stages to try public speaking, something that has nothing to do with throwing a punch and everything to do with learning to hold a room. The same thinking shapes her sparring events, kept strictly female-only, where students step into the ring while friends and family watch from the sidelines, learning to face an audience just as much as an opponent.

The club recently marked its tenth anniversary with an event that drew more than 150 women through the doors, a milestone that still seems to genuinely move her.

"It's like a sisterhood where you feel accepted, and you can just be yourself," she says.

As a teenager dealing with bullying, Hasina spent years trying to become someone else entirely, just to fit in. Martial arts was what gave her permission to stop. The name of the business reflects that lesson directly.

"I wanted to be diamonds, like strong people that are unbreakable," she says.

That is the standard she holds her students to as well. Not perfection, not toughness for its own sake, but the kind of quiet, unbreakable strength that comes from knowing exactly who you are.

What Holds Women Back

Asked what stops more women from starting businesses of their own, Hasina speaks from a specific, lived perspective.

"Culturally, I would say maybe with South Asian women, we're not really business-minded sometimes, and I think we doubt ourselves so much," she says.

She includes herself in that. Self-doubt, she believes, is one of the most consistent barriers women face, regardless of the industry. There will always be people telling you that you do not have the time, or that something else is more important, or that the timing is wrong. For Hasina, the timing was never going to feel right. She started Pink Diamond when her youngest son was three months old, not because the moment was convenient, but because she had decided it was time and refused to keep waiting for permission.

"One thing that we need to fix is our mindset. Yes, you can do it. You will never know unless you try it," she says.

Advice Worth Holding Onto

When Hasina talks to women considering starting their own business, her advice is short, practical, and entirely free of polish:

• Start anyway, she says. Start small if you need to.
• Do not pour everything into it on day one, because pacing yourself matters more than people think
• Setbacks are part of the process rather than evidence that you made the wrong call.

"There's gonna be setbacks. But if it's something that you're passionate about, something that you believe in, then you just have to push through it, push through the barriers. You can do it," she says.

One Word: Empowering

Asked to sum up her journey in a single word, Hasina does not hesitate for long.

"Empowering," she says. "It's something that I wish I had when I was growing up, and it's something that I've created for the younger generation."

She is clear that empowerment, to her, does not mean abandoning who you are to get ahead. It means holding onto your values while building something, not in spite of them.

"You can do anything you want as long as you do it with your values as well," she says.

The Takeaway

Hasina Rahman started Pink Diamond Martial Arts because the space she needed did not exist yet. Eleven years and over a hundred students later, she has built something that goes well beyond a gym. A place where confidence is taught as deliberately as any kick or punch, and where the real measure of success is watching a shy eight-year-old grow into a young woman leading her own class.

"Anything is possible as long as you have the drive and the determination," she says.

To find out more about Hasina and the community she has built, visit the Pink Diamond Martial Arts website or follow along on Instagram.

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