Varies: There is no specific dangerous heart rate during exercise. How fast your heart beats with exercise depends on a number of factors, especially your conditioning. If you are healthy, a heart reate in the 170's or even higher may be ok and tolerated.
Motion sickness caused by video games, sometimes called simulator sickness, is caused when there is a disconnect between what your eyes are seeing and what your body is feeling.
Car sickness is a type of motion sickness. Motion sickness occurs when the brain receives conflicting information from the inner ears, eyes and nerves in the extremities. Imagine a young child sitting low in the back seat without being able to see out the window â or an older child reading a book in the car.