Why Truck Drivers Face a Higher Risk of Blood Clots

Long-haul trucking is one of the most physically demanding careers in America, but not in the way most people think. The danger isn’t always in heavy lifting or strenuous activity — it’s in the hours of sitting still behind the wheel. Prolonged sitting restricts blood flow through the legs and lower body, which can contribute to the formation of deep vein thrombosis (DVT), a type of blood clot that forms in the deep veins, most commonly in the legs. If a clot breaks loose and travels to the lungs, it becomes a pulmonary embolism, which is a life-threatening emergency.

CDL drivers and professional truckers are particularly vulnerable because of the nature of their work. Extended periods of immobility, dehydration from limited rest stop access, irregular sleep schedules, and diets heavy in processed foods can all increase clotting risk. Understanding why blood clots develop is the first step toward preventing them — and keeping yourself safe and medically qualified to drive.

It’s also worth noting that blood clot history can affect your ability to pass a DOT physical exam. If you’ve had a DVT or pulmonary embolism, a certified DOT medical examiner will need to evaluate your condition carefully. Staying proactive about your vascular health is not just a safety issue — it’s a career issue.

Move Your Body: The Most Powerful Tool Against Clots

The single most effective way to prevent blood clots during long drives is regular movement. Even brief periods of physical activity can significantly improve circulation and reduce the risk of clot formation in the legs. The challenge for truckers is finding opportunities to move during a demanding work schedule, but it is entirely possible with the right habits.

Every time you stop — whether for fuel, a weigh station, or a meal break — make it a point to get out of the cab and walk. Even a five to ten minute walk can help pump blood through your lower extremities and prevent dangerous pooling. Leg stretches, calf raises, and ankle circles performed inside the cab at rest stops are also effective ways to stimulate circulation without requiring a full workout.

While driving, try to make small movements when it is safe to do so. Flexing your feet up and down, tensing and releasing your calf muscles, and shifting your seating position periodically can all help maintain blood flow. Experts generally recommend getting up and moving at least once every hour or two of continuous sitting, though every driver’s situation will vary based on route and schedule.

Stay Hydrated Behind the Wheel

Dehydration is a commonly overlooked contributor to blood clot risk. When your body doesn’t have enough fluid, blood becomes thicker and more prone to clotting. For truckers who sometimes limit their fluid intake to avoid frequent restroom stops, this is a real and underappreciated hazard. Staying well-hydrated is one of the simplest and most accessible strategies for protecting your vascular health on the road.

Water should be your primary go-to beverage during long hauls. While coffee and energy drinks are staples in many truck cabs, caffeine and alcohol both act as diuretics, meaning they can actually increase fluid loss and contribute to dehydration. Replacing even one or two of those beverages with water each day can make a meaningful difference over a long shift.

A helpful general guideline is to pay attention to the color of your urine — pale yellow typically indicates adequate hydration, while dark yellow or amber can signal that you need more fluids. Keeping a reusable water bottle in your cab and sipping consistently throughout the day, rather than drinking large amounts infrequently, is a practical and sustainable habit for road warriors.

Compression Socks and Supportive Clothing

Compression socks are one of the most widely recommended tools for people at risk of DVT, and truckers are a prime example of who can benefit from them. These specially designed socks apply graduated pressure to the lower legs, which helps push blood upward toward the heart and prevents it from pooling in the feet and calves. They are available over-the-counter in a variety of compression levels and can be worn throughout an entire work shift.

Many truckers who have adopted compression socks report that they also reduce leg fatigue and swelling during and after long drives, which is an added bonus for overall comfort on the road. If you are not sure which compression level is appropriate for you, or if you have any existing circulatory conditions, consult with a healthcare provider before purchasing. Higher-compression garments may require a prescription.

Beyond socks, your overall clothing choices matter too. Avoid tight-fitting pants or waistbands that can restrict circulation in the groin and thighs. Loose, comfortable clothing allows better blood flow throughout the lower body and is simply more practical during hours behind the wheel.

Diet, Weight, and Overall Cardiovascular Health

The dietary habits that are easy to fall into on the road — fast food, high-sodium snacks, sugary drinks — can negatively affect cardiovascular health over time. While diet alone does not directly cause blood clots, being overweight or obese increases pressure on the veins in the legs, raising your risk for DVT. Making smarter food choices on the road isn’t easy, but it’s an investment in your long-term health and career longevity.

Focus on foods that support heart and vascular health: fruits, vegetables, lean proteins, whole grains, and healthy fats. Many truck stops now offer healthier options, and packing your own food in a cab refrigerator gives you even more control over what you eat. Limiting processed foods, red meat, and excessive salt can help manage blood pressure, weight, and inflammation — all factors that influence clot risk.

Smoking is also a major risk factor for blood clots and cardiovascular disease. Nicotine damages blood vessel walls and promotes clotting. If you currently smoke, quitting is one of the most impactful steps you can take to protect your vascular health. Talk to your healthcare provider about cessation resources and support programs that can help.

Know the Warning Signs of a Blood Clot

No matter how diligent you are about prevention, it’s critical to recognize the warning signs of a blood clot so you can seek help immediately. DVT symptoms in the leg often include swelling, redness, warmth, or pain — sometimes described as a cramp or heaviness that doesn’t go away. These symptoms can occur in one or both legs and should never be ignored or dismissed as ordinary muscle fatigue.

A pulmonary embolism — when a clot travels to the lungs — is a medical emergency. Symptoms include sudden shortness of breath, chest pain, rapid heart rate, and coughing up blood. If you or anyone around you experiences these symptoms, call 911 immediately. Do not attempt to drive yourself to a hospital.

Early detection saves lives. If you notice any of the above symptoms, pull over safely and contact emergency services without delay. Educating fellow drivers about these warning signs is also a meaningful contribution to the safety of the trucking community as a whole.

Schedule Your DOT Physical in Modesto, CA

Keeping up with your DOT physical is an essential part of staying legally cleared to drive — and it’s also an opportunity for a healthcare professional to evaluate risk factors like poor circulation, high blood pressure, obesity, and cardiovascular concerns that can increase your clot risk. A certified DOT medical examiner can identify issues early and help you stay on the road safely and legally.

If you’re a CDL driver in the Central Valley area, DotModesto.com is a trusted local resource for DOT physical exams in Modesto, CA. Operated by a Board-Certified Family Nurse Practitioner, the clinic is designed specifically with professional drivers in mind. The team understands the demands of your career and provides thorough, respectful, and efficient DOT exams to help you stay certified and safe.

Don’t wait until your medical certificate expires or a health concern becomes a crisis. Take a proactive approach to your health by scheduling your DOT physical today at Affection Health Care, the clinic behind dotmodesto.com, conveniently located in Modesto, CA. Call (350) 216-5774 to book your appointment. Your health, your livelihood, and everyone sharing the road with you will be better for it.