What Happens to IndyCar Drivers' Bodies on the Track?

IndyCar
Author: Lütfi Mete Odabaşı
Creation: 19 October 2026

The body of an IndyCar driver who spends two hours sitting and turning the wheel carries the load of an elite athlete, enduring 5 G of force through the corners and losing three kilograms of fluid in 50-degree heat.

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What happens to IndyCar drivers' bodies on track goes far beyond the fast lap boards you see: up to 5 G of lateral force in corners, cockpit temperatures that can reach 50°C, and fluid loss of up to 3 kilograms in a single race. The body of a driver who stays behind the wheel for two hours experiences a race load similar to an elite athlete - and does it while sitting down. In this article, I will explain what that cockpit does to the body and how drivers prepare for it.

Highlights

In IndyCar, drivers can experience up to 5 G of force in corners
Cockpit temperature can reach 50°C (122°F)
Fluid loss through sweating in a race up to 3 kg of weight loss is possible
Throughout a race, drivers stay at 65-85% of their maximum heart rate
The Indy 500 lasts about 3 hours the record is 2 hours 41 minutes

What Happens to the Body During a Race? G Forces, Heat and Fluid Loss

Now let's get to the main part. According to official IndyCar data, drivers can experience up to 5 G in corners, and 1.5 G during acceleration. It's not hard to imagine: 5 G means five times your body weight pressing on you. You know how your head drops forward when you sit on a train? A driver's helmet presses sideways with five times its weight - for two hours straight.

The load doesn't just affect the muscles; it also affects breathing. During high G moments, the lungs and diaphragm are pushed upward, making it hard to breathe normally; drivers have to learn breathing techniques using their abdominal muscles. So you get the idea, right? Now try breathing with your muscles under 5 G.

Then there's the heat. On race days, cockpit temperatures can reach 50°C, and cooling for the driver in Indy cars is quite limited - so much so that in the weekend before the 2020 Indy GP, when air temperatures of 93°F (about 34°C) were expected, most of the cars on the grid didn't even have a constant high-speed flow of cool air. This heat causes drivers to lose fluids through sweating: they can lose up to 3 kg of weight in a race. Research shows that fluid loss during a race can exceed 3% of body weight; as heat rises, heart rate, body temperature and overall physiological stress climb together.

A Heart Rate Like a Marathon Runner's

Perhaps the most striking data comes from heart rate: in most motorsport disciplines, drivers stay within the 65-85% band of their maximum heart rate throughout a race. That is a physiological demand quite similar to the race load of an elite athlete. Measurements from Formula 1 show that drivers maintain a range of 150-190 bpm over a Grand Prix, averaging around 170 bpm, with peak values reaching 200 bpm. So the man who looks like he's just sitting there from the grandstands is actually running a marathon with his heart.

Indianapolis 500: Two Hours of Continuous Physical Load

Think about the Indy 500: 200 laps, a race of roughly 3 hours. Throughout this time the driver never stops; repeating G-loads, heat and the demand for concentration pile up lap after lap. Even lightness has its limits: the fastest running came from Arie Luyendyk in 1990 - 2 hours 41 minutes, at an average speed of 185.981 mph. So even in the record run, the body was in an ejection seat for nearly three hours.

Rather than exaggerating this load, let's take it a step further: the "Double Duty" idea, back on the agenda in 2026, means running both the Indy 500 and NASCAR's Coca-Cola 600 race on the same day. That means more than 1,000 miles of racing and spending nearly the entire day inside a car. As Katherine Legge prepares for this challenge, she emphasizes that the mental challenge may even exceed the physical demand; some liken it to driving nonstop from New York to Daytona Beach - and that journey doesn't have 5 G per corner.

Is IndyCar Harder Than F1? Comparing the Two Series in Terms of the Body

So which is more exhausting? The short answer: they wear out different parts. In F1, forces of up to 6 G are seen in braking and cornering zones - like roughly 600 pounds pressing down on the driver. But IndyCar has a load unique to the body, and this load comes from the car's technology: Indy cars have no power steering, traction control or ABS. You turn the steering wheel with your own muscles, and you modulate lock-up with your own toe.

Also, when aerodynamic load increases, an Indy car puts noticeably more stress on the driver's wrists, arms and shoulders compared to F1. Heat stirs the pot as well: as temperature rises, Indy cars lose downforce and gain drag, the car loosens up, and high heat instantly changes the load on both car and driver. Since safety elements like the Aeroscreen can restrict the cooling airflow into the cockpit, heat management is left on the driver's shoulders.

Feature	IndyCar	Formula 1
Cornering/braking G-force	Up to 5 G	Up to 6 G
Power steering	No	Yes
Traction control and ABS	No	Yes
Area bearing the most load	Wrists, arms, shoulders	Neck

So the honest answer to "which is harder" is this: while F1 is more brutal in sudden bursts of force, IndyCar continuously taxes the driver's arms, neck muscles and heat tolerance.

Neck and Abdominal Muscle Training: How Do Drivers Prepare in the Gym?

Virajda direksiyona değil, kendi bedenine karşı direnen pilotun en büyük silahı salonlarda kazandığı o çelik gibi boyun ve core kaslarıdır.

Here's a surprise for you: an IndyCar driver's fitness program runs all year long, because they battle heat, G-forces and dehydration inside the car every day. This job is very different from a weight session at an ordinary gym. At the specialist facilities where Indy 500 winner Scott Dixon also trains, the program is built around the core (abdominal-trunk area), arms and neck.

Neck training is a science of its own. Sample programs highlight resistance work with specialized neck equipment, anti-rotation core exercises and moves like the pallof press - exercises that can be done standing, seated or against a wall, teaching the body to resist rotational forces. Why? Because in a corner, the head has to stay upright against the force trying to rotate the body. Training programs also include exercises simulating lateral and rotational G-forces, along with a balanced neck-core-upper back routine. So that thick neck you see on a driver's shoulders is not there for nothing.

The picture is similar on the Formula 1 side: neck work with resistance bands, weight training, isometric exercises, cardio and mental training. Both series point to the same truth - the modern racing driver is a fully equipped athlete from the moment they put on their helmet.

Pre-Race Nutrition, Hydration and Strategy

When drivers leave the gym, the work is not done; they also set tactics in the kitchen. IndyCar drivers consume carefully formulated sports drinks adjusted to their individual needs, with an electrolyte and carbohydrate balance emphasizing sodium in particular, because that is the main mineral lost through sweat. A typical race day goes like this: scrambled eggs, whole wheat toast, fruit and a hydration drink for breakfast; as the race approaches, easy-to-digest yet energizing options like a protein shake, Greek yogurt with honey and nuts.

Timing is also critical. Common race hydration practice recommends drinking 8-16 oz (about one to two glasses) of water or a sports drink up to an hour before the race, then sipping according to thirst. The picture is the same on the Formula 1 front: a good diet and hydration regimen is considered a vital tool that enables the driver to perform at their best during a race weekend. In short, every liter lost in the cockpit is replenished as deliberately as tire strategy.

Frequently Asked Questions

How much fluid do drivers lose in a race?

Through sweating, they can lose up to 3 kg of body weight; some measurements show fluid loss during a race can exceed 3% of body weight. The loss increases with cockpit temperature and race duration.

How do the neck muscles endure this load?

Through year-round specialized programs: resistance band neck work, anti-rotation core exercises and isometric movements. The goal is to build resistance against the forces trying to rotate the head and body in a corner.

Why is running two races in one day so hard?

Double Duty means racing more than 1,000 miles in a single day: maintaining uninterrupted focus through a three-to-four-hour IndyCar race plus a five-hour NASCAR race. The mental demand is added on top of physical fatigue, and balance can be easily upset.

Final Word: The Cockpit Is a Gym

Next time you watch the Indy 500, I say don't look at the standings, look at the driver. When he enters that corner, there's someone whose head is thrown to the side, who wrestles the steering wheel with his arms, and who races with one sip less water every lap in a 50-degree cockpit. And the secret to him being able to handle that moment isn't race morning - it's year-round neck and core training, bottles of electrolytes, and a coldly calculated lifestyle. Do you think an NBA player could handle the same two hours? My money's on his neck training.