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Cardiologist reveals what flying does to your heart health; shares how to protect yourself on every flight

Updated on: Nov 12, 2025, 08:29:27 IST
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Most people think flying is just sitting in a chair in the sky. But your body, especially heart, is doing real work up there. (Freepik)
Most people think flying is just sitting in a chair in the sky. But your body, especially heart, is doing real work up there. (Freepik)

Dr Dmitry Yaranov shares heart health tips for air travel, emphasising hydration, avoiding salt and alcohol, stretching, and more tips. 

Every time you fly, the prospect of exploring new cultures and arriving at new destinations invokes a sense of excitement. However, did you know that flying might take a toll on your body? According to Medical News Today, it may cause dehydration, bloating, jet lag, and a higher risk of infections.

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Moreover, it takes a toll on your heart, too. In an Instagram post shared on November 12, Dr Dmitry Yaranov, MD, cardiologist who specialises in heart failure, advanced heart failure, and heart transplantation, detailed the effects of flying. Let's find out what the cardiologist shared.

This is what flying does to your heart

Sharing the effects flying has on your cardiovascular health, Dr Yaranov pointed out, “Most people think flying is just sitting in a chair in the sky. But your body is doing real work up there.” Here's what he revealed happens to our heart when we are up there in the air:

Cardiology version: What happens during a flight, according to the cardiologist, Dr Yaranov

• When the cabin pressure drops, your oxygen levels fall.

• This leads to your heart working harder to deliver the same oxygen it was providing your body earlier.

• Moreover, cabin air is drier than the desert, which is why you lose water inside your body just by breathing.

• While flying, your blood volume also goes down, which means your blood gets a little thicker.

• Additionally, sitting for long hours on a flight slows circulation, leading to our legs getting heavy and swollen.

• Lastly, your airway lining also dries, leading to the immune system barrier weakening.

The cardiologist also noted that the ‘jet lag’ you feel after a flight isn't just because of the time zones. Rather, it is your physiology.

This is what flying does to your heart. (Google Gemini)
This is what flying does to your heart. (Google Gemini)

How to protect your heart?

The cardiologist also revealed what he does to protect his heart health on every flight. Here's what he recommends:

• Hydrate before boarding (start ahead, not behind).

• Skip salt and alcohol in the air (both thicken the blood).

• Stand and stretch every hour to keep circulation moving.

• Use a saline nasal spray before takeoff to protect the immune defence.

• Walk after landing to reset blood flow and oxygen delivery.

“Tiny habits. Massive difference when you land. Your heart travels with you. Treat it like it matters,” the cardiologist advised in the end.

Note to readers: This article is for informational purposes only and not a substitute for professional medical advice. Always seek the advice of your doctor with any questions about a medical condition.

This report is based on user-generated content from social media. HT.com has not independently verified the claims and does not endorse them.

  • Krishna Pallavi Priya
    ABOUT THE AUTHOR
    Krishna Pallavi Priya

    Krishna Priya Pallavi is a journalist with over 9 years of experience, covering health, fashion, pop culture, travel, wellness, entertainment, festivals, mental health, art, decor, fitness, and sex and relationships. She is an alumna of the Indian Institute of Mass Communication (IIMC), Dhenkanal, and holds an undergraduate degree in Journalism and Mass Communication from Guru Gobind Singh Indraprastha University, Delhi. Her strong academic foundation informs her analytical and detail-oriented approach to storytelling, helping her uncover stories where none seem to exist. Before joining Hindustan Times, Pallavi worked with some of India’s leading media organisations. She spent close to three years at India Today, where she honed her newsroom skills and developed a sharp editorial sensibility. She also worked for over a year and a half at Vagabomb, ScoopWhoop’s feminist digital platform, where she explored stories through a gender-sensitive, socially aware lens. Pallavi has a deep interest in global fashion trends and international fashion seasons, and enjoys interviewing celebrities and tracking pop culture movements—interests that frequently translate into engaging, reader-friendly stories. Alongside lifestyle and entertainment, she has a keen eye for impactful health and wellness journalism, regularly interacting with doctors, designers, and digital content creators to bring nuance and credibility to her work. Born and raised in Haryana, Pallavi remains deeply connected to her ancestral roots in Odisha. Her ability to spot fresh angles brings curiosity and depth to stories she pursues. When not chasing deadlines, she enjoys spending time with her dog, planning her next vacation, reading, running new trails, and discovering new destinations.Read More

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