But it can pose health risks, including a slim risk of stroke that is worth noting. This is particularly true for those with high blood pressure or heart conditions, which is why there are signs at the entrances of roller coasters and other adventures rides warning that these people should not go on them.

For the vast majority of healthy individuals, rollercoasters are perfectly safe, but they do pose risks for people with specific underlying health conditions. The high G-forces (gravitational forces) can cause a sudden spike in blood pressure and heart rate, which can be dangerous for those with heart disease or hypertension. The rapid "jostling" and changes in direction can also trigger neck and back injuries or worsen existing spinal issues. A significant concern is for individuals prone to retinal detachment or those with a history of aneurysms, as the pressure changes can exacerbate these conditions. There is also a small risk of "rollercoaster-induced" ear barotrauma or vertigo. However, modern coasters are engineered with precision to stay within "human tolerance" limits. This is why every major ride has clear warning signs—if you are pregnant, have heart, back, or neck problems, or have had recent surgery, you should follow the manufacturer's advice and skip the ride to avoid a medical emergency.