There is a version of this story that starts with weights, GPS vests, and heart-rate zones. This is not that story. This one starts on the Eastern Stand at Loftus Versfeld, somewhere around 2003, with a kid painted blue watching his team fight for a place in a Currie Cup final.
“It’s always been blue in the blood,” he says now, and you believe him. That kid grew up to become the man now responsible for making sure the players he once idolised can actually get through 80 grueling minutes.
Meet Rupert Oberholster, the Vodacom Bulls’ new head of athletic performance, and the architect tasked with ensuring head coach Johan Ackermann’s squad turns up weekly in peak physical condition.
A brief that covers everything
Ask Oberholster what he actually does, and the answer is far grander than most fans realise.
“I’m the head of athletic performance,” he explains. “So that’s basically overseeing the whole medical staff, strength and conditioning, and the sports science department, from the juniors right through to the seniors.”
While Oberholster manages the overarching strategy, the hands-on, sweat-and-sprints side sits with Andre Volsteedt, who runs the gym floor. It is a sprawling, high-pressure brief. It is also, clearly, exactly where Oberholster wants to be.
The Ackermann connection
Long before Loftus, there was a school field and a teenage athlete who needed looking after.
Oberholster’s bond with Ackermann, the coach who would go on to shape his career across multiple rugby unions, did not start in a boardroom or via an agent. It started with a son.
“I started at the Leopards as their head of S&C in 2012,” Oberholster explains, “and then moved to Garsfontein High School to do private S&C.”
Ruan Ackermann, Johan’s son, happened to be a pupil there, and Oberholster became his strength and conditioning coach. “That’s where I met him,” he says matter-of-factly, as if the whole trajectory of his professional career hadn’t quietly pivoted on that single schoolyard appointment.
The relationship quickly evolved. When Ackermann later needed someone at the Emirates Lions who could handle both rehabilitation and S&C in one pair of hands, he didn't run a lengthy corporate search process. He simply picked up the phone.
“He gave me a call,” Oberholster says. “We’ve worked together basically since 2015, when I started at the Lions.”
More than a decade on, that trust has followed both men through South African rugby, a stint in Japan, and now back to Pretoria. It is a partnership built less on CVs and more on a head coach who watched a young trainer work with his own son and refused to let that talent go.
The Japan adventure
Before returning to Loftus, there was Urayasu. Oberholster spent five years in Japan, first with Urayasu D-Rocks, then with Kyuden Voltex, a club building toward promotion on a tight budget but with massive dreams.
“We had good success,” he says simply. “It was the best year that they’ve had in their history.”
No wasted words. Just results.
However, it is what Japan did to his mindset, rather than his medal cabinet, that makes him light up.
“They are very process-driven,” he says. “Your planning needs to be spot on because they don’t like to adapt on the fly. It forced a level of precision I still carry. Our planning has to take everything into consideration. You’ve got to have a Plan A and a Plan B, and everyone needs to know about it beforehand.”
He pauses to appreciate the culture of respect that left a lasting mark on his family. “We loved the respect, just all over—the players, the staff. It was brilliant.”
High performance with a higher purpose
At 37, with a CV that stretches across two continents and multiple sporting codes, Oberholster’s core motivation remains refreshingly unguarded.
“Everything I do, I do for the Lord,” he says. “I feel He’s given me the talents, and I love sport. Whatever talent He’s given me, I need to go and express it and work hard on it.”
It is not just personal expression, though; it is a desire to serve.
“That’s probably the biggest satisfaction you get,” he says. “If you work with a player who has got so many work-ons, you build trust, you spend time together, and then you see the success that he achieves.”
Success in Oberholster’s world is never measured solely in silverware. “Ultimately, wearing the green and gold is part of it, but also just life success. If a player makes it, he can help his family. It’s a big-picture outlook for me.”
The runner behind the rugby
Rugby, cricket, and athletics filled Oberholster's own school years, alongside a short stint playing sevens rugby for the Leopards. Today, distance running has quietly become his true passion.
“I love my running,” he says, breaking into a wide grin. “I've done the Comrades Marathon. I'm definitely going to do another one whenever the rugby schedule allows.”
Most mornings before the players arrive, the gym belongs to him. It is the same unwavering discipline he demands of his squad, applied to himself first.
When asked the ultimate sporting question—does fitness win games?—Oberholster refuses to take the easy way out.
“I don’t think the fittest team necessarily wins,” he says, “but if you’re not fit, you will lose.”
It sounds like a riddle until he unpacks the science. “It’s that one extra pass, that one extra ruck that you either miss because you’re fatigued, or you make because you are fit enough to hit that tackle. Small moments. Fractional margins. The difference between a turnover and conceding a try.”
That philosophy drives a newly expanded injury-prevention programme running behind the scenes at Loftus. “The more a player can play and train, the better he can get,” Oberholster says. “You don’t get better as a rugby player by being injured and sitting on the sidelines.”
Family, faith, and the fine print
Married for 13 years and a father to a 10-year-old daughter and a seven-year-old son, Oberholster’s family has willingly followed his career across the globe. They have navigated speaking Afrikaans at home, English at school in Japan, and are now adjusting back to the South African schooling system.
“It’s been a challenge for them,” he admits, before adding with obvious pride, “but they are amazing.”
Downtime looks a lot like his working life: outdoors, active, and united. It involves backyard rugby with his son, or family runs with his wife pacing alongside him while the kids follow on bicycles. “We love spending time with family and friends. That’s what we do.”
What success looks like at Loftus
For all the numbers, GPS data charts, and medical reports that fill his workweek, Oberholster’s definition of success remains grounded in old-fashioned simplicity.
“Have we made all the players better at the end of this season than what they were at the end of last season?” he asks. “Are they stronger, fitter, or better people? Did we help them off the field as well?”
Lift the United Rugby Championship or Currie Cup trophy? Sure. But build the man first. That is the ultimate goal. For the Vodacom Bulls faithful who painted themselves blue right alongside a young Oberholster all those years ago, it is hard to imagine a better person to be trusted with the job.