An orthopedic surgeon from Mumbai won the Indian title at the Tata Mumbai Marathon on debut, then ran 2:13 in Delhi 40 days later. Dr. Karthik Karkera Shetty on training, racing, and what most Indian amateur runners are getting wrong.
This piece is a compilation of key-takeaways from a long-form interview with Dr. Karthik Karkera Shetty, conducted by Rajesh Vetcha for the NMDC Hyderabad Marathon team’s “Beyond the Track” webinar series — The Runner’s Foundation: Consistent Training for Better Performance. All credit for the conversation and the questions goes to the Hyderabad Runners community.
When Dr. Karthik Karkera Shetty became the winner of the Tata Mumbai Marathon 2026, most of the running community had one simple question: who is this guy?
A 29-year-old orthopedic surgeon. Trained under a Russian Olympic 800m gold medalist. Ten years of consistent running, but no big results before this. And then, just 40 days after Mumbai, he ran 2:13 at the New Delhi Marathon — close to India’s marathon national record.
This is not an overnight success story. He played field hockey for his school from 4th to 9th grade in Mumbai. His father took him to practice every morning at 5 a.m. He wanted to be a chartered accountant. He became a doctor. He picked up running seriously around college, and then never stopped.
The visible breakthrough was the result of ten years of invisible work.
Karthik wears the “amateur” label with pride. Asked if he found it limiting or liberating, he said:
“I am very happy that I have been called an amateur. I relate to amateurs a lot. My life is very close to the life of an amateur athlete — working daily, finding time for training, but still wanting to perform well. If I can do it, then you can do it too.”
This is the most important thing about Karthik. He works a full-time medical job. He trains around it. He is not on a payroll from the Army, the Railways or the Services. And he just beat them all.
Karthik never planned to peak for Mumbai. His real target was the New Delhi Marathon, because Delhi is an Asian Games qualifying race. Mumbai was a training run to learn what a marathon feels like.
In his own words:
“Mumbai was a part of a training plan. I didn’t want to get a shock on the main day. I thought — okay, let’s get an experience in Mumbai. Let’s see where exactly I hit the marathon wall.”
He did hit the wall. At 35k. After making what he later called a “very, very drastic move” at 30k because he was feeling good. After 35k he was getting cramps in his hamstrings, and his hamstring was getting pulled. Most runners stop at this point.
Karthik changed his running form mid-race. He shifted from hamstrings to quadriceps — running more from the front of his thighs to take load off the cramping muscle. Not pretty. But it kept him moving at pace.
Most marathoners need three to six months between marathons. Karthik turned around in 40 days and ran a faster time.
Delhi started at 4 a.m. Karthik woke up at 1 a.m. to follow his pre-race routine — nutrition, warm-up, mental prep.
From the gun he sat in the lead pack. No surges. No aggressive moves. Just even pace.
He went through halfway in 1:05:54 — that is national-record marathon pace. He felt fresh. He felt in control.
After 35k, the pack slowed down. Both his competitors were tired. The race got tactical. Most elites were planning to kick at 40k.
Karthik waited longer. He held back until 41.1 km — the last kilometre. Then he sprinted.
“I made the first move. Whoever makes the first move gives the other athletes a shock — an injection of pace. I was prepared for it. I just pulled it till the finish line.”
Last kilometre: 2:45. After running 41 km. That kick won him the race in 2:13.
What is striking is what Karthik says he had left after finishing:
“I had a lot in me still left. The next five minutes I was thinking — okay, the national record is in my hand. I just need a right opportunity.”
The lesson from Mumbai vs. Delhi:
Karthik’s favourite distance is 1500m, not the marathon.
His original plan for the Asian Games was to qualify on the track, in 1500m. The marathon was a recent addition. He used road races as off-season training to keep his mileage up.
His winning kick at Delhi? That was 1500m speed.
“My 1500m speed got me that win.”
This is an unusual profile for an Indian marathoner — a track speedster who also has the endurance to run 2:13.
Karthik trains under Yuri Borzakovskiy, the Russian who won the 800m gold at the 2004 Athens Olympics.
This is an unusual match — an 800m specialist coaching a marathoner. But the most important thing Yuri taught Karthik was not running. It was visualisation and manifestation.
“When my coach taught me visualisation, my mind was not mature enough to understand. But now, I see it has very, very strong power in it. If you hack the system of manifestation, you can achieve much bigger things in life — not only in sport.”
In 2022, Karthik flew to Moscow and tested at the Russian Olympic Committee’s lab. His VO2 max came back at 72 ml/kg/min — elite-male territory, comparable to international distance runners.
He moved from Mumbai to Nashik to train, mainly because managing his medical work and serious training together in Mumbai was not possible. Nashik had better weather, better roads to run on, and was close enough to home.
Many people credit Karthik’s 2:13 to consistency. But Karthik himself credits something else first — science and study.
“I very much believe in this quote — knowledge is power. I have put my knowledge into power. I study a lot. I read a lot of books on running and on the new science going around in the world. I would say I have worked hard, I have been consistent, but the science part has helped me a lot to get this 2:13.”
The athletes and coaches whose training and methods Karthik has studied closely:
Karthik’s peak weekly mileage is around 160 km. His biggest month was 680 km in December last year, building into the Mumbai Marathon. That is high — but not crazy by elite standards.
What is more interesting is what he says when asked what an amateur runner should do.
“If you do 70 kilometres a week, plus two strength training sessions, that is the perfect combination. That’s it. You don’t need anything else. Strength training will help you run faster even with less mileage. 60 to 70 kilometres a week is very good.”
So for an amateur Indian runner — 70 km a week + 2 strength sessions. Not 100 km. Not 120 km. Seventy.
He is also honest about how hard he actually pushes:
“Overall, I have been very easy on my body. I never pushed very hard. The only time I worked very hard was the COVID year, because everything was closed and I was not working.”
Read that line again. India’s amateur 2:13 marathoner says he is not a hard worker by nature — he is a consistent worker. He never overtrained. He saved it for race day.
Karthik follows the standard endurance rule: 80% easy running, 20% hard.
“I keep a lot of easy runs, getting miles accumulated, and very few good sessions that give you the race feeling. I have never overtrained.”
Most amateurs do the opposite. Their easy runs are too hard, and their hard sessions are too soft. Karthik’s easy runs are properly easy. His hard sessions — VO2 max intervals, threshold work, hill repeats — are properly hard.
His weekly mix beyond running:
He is clear: strength and plyometrics are not optional. They are why he can run fast and stay injury-free.
This was the most useful part of the conversation. Three patterns Karthik sees:
1. Comparing yourself with others, and following group plans. In running clubs, the same workout often goes to a 4:30 marathoner and a 3:15 marathoner. The 4:30 runner trains too hard. The 3:15 runner barely warms up. Karthik says every runner needs their own structured plan, built for their current fitness — not for the strongest runner in the group. “Don’t compare yourself with anyone."
2. Indian food is mostly carbs. This is the one Karthik feels most strongly about. His words:
“Indian food is mostly carbs, carbs, carbs. But when you need performance, there should be fibres, proteins and supplements as well. If you train hard but eat like a person who does nothing, you are not benefiting from your training.”
The takeaway is — add protein, add vegetables, add supplements where required. Match what you eat to what you are asking your body to do.
3. Inconsistency because of work. Most Indian amateurs train hard for two months before a target race, then disappear for three months because of work pressure, and then start again. Karthik runs around an active surgical practice. He says the real answer is not “more time” — it is not stopping completely. Even reduced training during busy weeks keeps the engine going.
On race day:
On recovery, Karthik treats it as part of the training plan, not as something extra:
His point is not that every amateur should buy NormaTec boots. His point is — plan recovery the way you plan your workouts. Sleep, walks after runs, basic massage, easy days that stay easy. These are non-negotiable.
When asked which running myth he wants to bust, Karthik picked this one immediately. But his answer is more careful than a simple “running is good for you”:
“Marathon running is actually not very good for your knees, unless you support it with strength training. Get the muscles around the knees strong. Get your nutrition right. I have been doing this for ten years and I have been injury-free.”
So the message is not “run as much as you want, knees are fine.” The message is — run + strength train your legs, twice a week, for life. That is the orthopedic surgeon’s prescription.
Karthik is clear about the Asian Games — he is going as a contender for a medal. Not as a participant.
He believes 2:10 is achievable in his current setup. With a full support team — coach, nutritionist, sports scientist, physio, massage therapist — at a major international marathon, he thinks 2:08 to 2:06 is possible. (He pointed to British 1500m world champion Jake Wightman, whose support team had 16 people.)
The single biggest thing holding him back? High-altitude training. His own words:
“What is stopping me is that I am managing all this myself. Because of my work, I am not able to use high altitude. High altitude plays a very important role.”
He is not the only one breaking through. Sawan Barwal — another Indian amateur — broke the national record on his own debut marathon this year. There is a small but real “debut psychology” pattern emerging. Amateur Indian runners with no marathon expectations, no reputation, and no fear are starting to win.
When asked to pick between Eliud Kipchoge and Sebastian Coe, Karthik picked Kipchoge — not just because of his running, but because they are friends.
“From 2018, Kipchoge and I are like friends. I have been to Kenya. I have talked to him. The way he motivates you — Sebastian Coe will not be able to do that. For me as an amateur, that is more important than the running itself.”
We will be tracking Karthik through the Asian Games and beyond. India’s first sub-2:10 marathoner this decade may very well be the doctor from Mumbai who learned to run from a Russian 800m specialist.
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