Well-sealed cars are more likely to cause motion sickness due to the following reasons:
Reduced Air Circulation – A tightly sealed car limits fresh air exchange, leading to a buildup of carbon dioxide and other gases. Poor ventilation can contribute to discomfort and nausea.
Stronger Odors – The enclosed space traps odors from materials, air fresheners, and exhaust fumes, which can intensify feelings of nausea for sensitive individuals.
Increased Sensory Mismatch – Motion sickness occurs when there is a conflict between what the eyes see and what the inner ear senses. In a sealed car with fewer open windows, passengers may have a limited external view, making it harder for their brain to process movement correctly, increasing the chances of dizziness and nausea.
Higher Humidity and Heat – Sealed cars tend to retain heat and moisture, especially when multiple passengers are inside. A hot and humid environment can exacerbate discomfort and contribute to motion sickness.
Lack of Fresh Oxygen Supply – Without proper airflow, oxygen levels may slightly decrease, while carbon dioxide levels rise, leading to drowsiness and an increased likelihood of nausea.
To reduce motion sickness in a well-sealed car, it is helpful to improve ventilation by using the air conditioning system, opening windows occasionally, focusing on a distant point outside, and avoiding strong odors inside the vehicle.
