World champion driver Fernando Alonso adheres to a strict diet plan from McLaren. Mark Thompson / Getty Images McLaren has revealed a typical training day diet plan that its elite Formula One drivers Fernando Alonso and Stoffel Vandoorne adhered to during pre-season training in recent weeks.

A typical F1 driver must be a highly-conditioned athlete in order to cope with the physical nature of the sport.

For example, a strong neck is essential, as the G-force endured around corners on a track can make a driver's helmet feel five times heavier than normal.

As well as a strong core, F1 athletes must also possess the stamina of long-distance runners, as a typical Grand Prix can last 90 minutes.

Nourishing their bodies with the correct fuel is therefore equally as important for drivers as ensuring the F1 cars are equipped with the optimum gear. Right now, McLaren athletes Alonso and Vandoorne will be racing toward peak fitness as they ready their bodies for the first contest of the 2017 F1 calendar at the Australian Grand Prix in Melbourne on Sunday, March 26.

Scroll down to see what an F1 driver eats for breakfast, lunch, dinner and in between, and you too can eat like some of the fittest athletes in motor sport.

Breakfast — 7 a.m.

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A 550 calorie breakfast of porridge, fruit, and seeds is consumed one hour before the first training session of the day. One portion of orange juice (with a squeeze of lemon) is permitted, along with green tea.

Lunch — 12.30 p.m.

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A healthy lunch can include a tofu garlic stir-fry with vegetables and wholegrain rice. Fresh coffee (or green tea) can be consumed, along with a few squares of 85% dark chocolate.

Dinner — 6.30 p.m.

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The first source of meat/fish of the day is provided at dinner in the form of grilled mackerel served with a small baked sweet potato and salad.

A dessert of yogurt and berries is served after dinner, and a late evening snack — such as crackers with marmite and fruit — can be consumed at 9 p.m., but bedtime is 10 p.m.

McLaren's typical training day diet plan

The full diet plan, which includes a brief training schedule, can be seen below.

All fitness training and advice was provided by McLaren Applied Technologies Human Performance Programme.