Inside Gurindervir Singh's 100m National Record: James Hillier on the Science, Rivalry and India's Sprinting Golden Generation

During the Federation Cup 2026 at the Birsa Munda Athletics Stadium in Ranchi, Gurindervir Singh did not merely break the 100m national record. He looked different doing it.

The drive phase was cleaner. The transition stayed compact. Most importantly, unlike previous races where he often dominated the opening metres before tightening late, Gurindervir accelerated through the finish line. And it was that final segment which changed everything.

His 10.09 seconds at the Federation Cup made him India's fastest-ever man and pushed Indian sprinting into territory that once felt almost unreachable. But according to James Hillier, the British coach overseeing India's sprint programme as High-Performance Director under the Reliance Foundation setup, the most important part of the performance was not the timing itself. It was the transformation behind it.

"When he first joined Reliance, I wasn't happy with how he was running," Hillier said in a media roundtable while explaining the biomechanics behind Gurindervir's evolution.

The coach revealed that Gurindervir initially relied too heavily on muscular force rather than sprint efficiency. He could run an explosive 60m or 70m but struggled to finish races strongly. "He was muscling his way down the track," Hillier explained. "He was strong as an ox, but it was ineffective."

That observation became the starting point of one of the most fascinating sprint transformations Indian athletics has witnessed in recent years.

Hillier and the Reliance coaching setup realised Gurindervir possessed exceptional "reactive qualities" particularly in his tendon efficiency. Instead of producing force purely through muscular effort, elite sprinters rely heavily on elastic tendon reactions to create efficient speed and maintain momentum through the latter phases of the race.

"I'm a big fan of running using the tendons," Hillier explained. "The tendon stores energy much more efficiently than muscle."

To unlock that potential, Gurindervir's entire sprint profile had to change.

The first step was physical restructuring. According to Hillier, Gurindervir carried excessive upper-body mass when he joined the programme around 18 months ago. That weight helped him generate force early in races but reduced efficiency later.

"We had to strip a lot of extra weight," Hillier revealed. "The weight was in the wrong place. He was too big upper body."

The transformation since then has been dramatic. "If you look at him 18 months ago versus now, the muscle quality is so fantastic," Hillier said. "Now he has really good lean muscle and he's developed the reactive qualities in his tendons."

That technical shift explains why Gurindervir suddenly looked so different in Ranchi.

For years, India's top sprinters often exploded out of the blocks but struggled to sustain velocity through the closing stages. At the Federation Cup, however, Gurindervir was actually pulling away from Animesh Kujur in the final metres something Hillier considers hugely significant because Animesh, primarily a 200m runner, is naturally strongest at the end of races.

"Animesh would always close people down," Hillier explained further. "But Guri was running away from him at the end of the race."

The most fascinating part of the Federation Cup 2026, however, was not merely the national record itself. It was what happened psychologically around it.

Less than 24 hours before the final, Gurindervir Singh had broken the national record in the semifinal. Minutes later, Animesh Kujur broke that very record in the next race. Suddenly, Gurindervir was no longer India's fastest man.

When asked how rare it was psychologically for an athlete to respond to that kind of pressure with another record-breaking performance, Hillier admitted even he had rarely seen something similar before.

Hillier said, "Yeah, I mean I don't know because I've never seen it before... "But it just shows the competitiveness of the athletes."

The British coach explained that the reaction inside the Reliance Sports Foundation sprint setup revealed the mentality now driving India's new sprint culture.

"One of the things that I say to all of them is, you need your training partners to improve you also," Hillier explained.

"So your primary goal is to improve yourself and your secondary goal is to improve your training partners."

According to Hillier, Gurindervir's response to losing the national record perhaps best captured why this current group of sprinters is evolving so rapidly.

"Guri broke the national record and then he was cheering Animesh and genuinely happy when Animesh broke the record," Hillier recalled.

"He's not viewing it as, 'Oh no, I've lost my record.' He's viewing it as, 'Okay fair enough. If you want to run faster, then I'll run faster than you.'"

That internal rivalry has now become one of the biggest driving forces behind Indian sprinting's rapid rise.

At the Federation Cup, all three medal winners in the men's 100m final Gurindervir Singh, Animesh Kujur and Pranav Pramod emerged from the same Reliance training ecosystem.

Hillier believes the combination of elite talent, friendship and ruthless competitiveness is creating what could become a historic phase for Indian athletics.

"They room together and they're very close," Hillier said. "But at the same time, when they're on the track, they're going to kill each other. So that's great."

The coach even described the current batch as India's "golden generation" of sprinters. "We've got to take advantage of this golden generation of sprinters," he said.

But while the rivalry became visible publicly in Ranchi, the technical transformation behind Gurindervir's 10.09 had been quietly built over months.

When myKhel pointed out to Gurindervir that the drive phase and transition in his race looked unusually clean technically, the Indian sprinter revealed how carefully every phase of his race had been reconstructed this season.

"This year we worked step by step," Gurindervir explained.

"We first worked on the first four steps, then the first 30m, then 30 plus 10, and then 50m." Initially, the entire focus remained on building a stronger opening 60 metres.

"That's why my 60m became very strong," Gurindervir said.

But the coaching group quickly realised another weakness remained his final 20 to 30 metres. "After I became strong in 60m, the rest of my race was not so strong because we didn't work on that," he admitted.

That weakness was visible earlier this season in New Delhi, where Gurindervir's acceleration looked explosive but his closing phase lacked efficiency.

After that race, Hillier and the Reliance coaching group shifted their attention completely toward the transition zones between 70m and 80m the most critical section in elite sprinting.

"After coming back from Delhi, we worked on 70m to 80m and that became game changing for me," Gurindervir revealed. Later at the Indoor Nationals in Bhubaneswar, the Punjab athlete created a new national record in 60m with a timing of 6.60s.

The difference became obvious in Ranchi. Instead of fading late, Gurindervir accelerated through the closing stages and separated himself from the field.

For Hillier, that progression represents far more than one athlete improving.

It represents Indian sprinting finally evolving into a high-performance system built around biomechanics, sports science, technical modelling and elite internal competition.

"We've been talking about this for many years," Hillier said. "It has been many years of work to get to this point."

"But now we're really seeing the results of six years of working tirelessly behind the scenes without any media interventions or anyone really knowing what we're doing. We're just quietly getting on with things."

Hillier also credited Gurindervir's previous coach 'Happy' for building the early foundations of his sprinting career before he entered the Reliance system.

And perhaps the most remarkable aspect of the entire story is that the coaching group still believes the ceiling remains far away.

"We don't talk about sub-10," Hillier revealed. "We talk about 9.98."

The statement captures the philosophical shift happening inside Indian sprinting.

The goal is no longer emotional dreaming or symbolic milestones.

It is scientific progression.

Hillier explained that the staff studies the exact profile required for a 9.98 sprinter from acceleration markers and force production to race modelling and technical efficiency. "What are your markers? Once we hit those markers, then we know it's possible," he said.

At Ranchi, Gurindervir Singh did not simply run 10.09 seconds. He offered India its clearest glimpse yet of what a modern sprint system in the country could eventually become.