It’s caused by the blood supply to the brain becoming blocked.
Stroke symptoms include a drooped face on one side, difficulty raising arms, and slurred speech.
Stroke risk increases if you’re overweight or obese, according to the Stroke Association.
But, how much should you weigh to lower your risk of the deadly condition?
“Being overweight puts you at risk of high blood pressure, heart disease and type 2 diabetes, all of which increase your risk of a stroke,” said the charity.
“It’s not just how much weight you carry, but how you carry it as well.
“If you carry extra weight around your waist, you are more likely to have high blood pressure, diabetes or other health problems.
“So, it’s even more important to make sure you’re a healthy weight.”
The exact weight people should be varies from person to person, said the Stroke Association.
It’s best to speak to a GP to find out what weight you should be aiming for.
But, a good indicator of healthy weight is to calculate your Body Mass Index (BMI).
The index compares your weight to your height, and reveals whether you’re underweight, a healthy weight, overweight, or obese.
“It takes into account that people come in different shapes and sizes, by comparing your weight against your height,” the charity added.
Being overweight increases your risk of stroke by about 22 per cent, it said.
People that are obese are 64 per cent more likely to have a stroke.
The best way to lose weight is to make small, long-lasting changes to your lifestyle.
The Stroke Association suggests doing exercise everyday to burn off calories, or to maintain a healthy weight.
Every adult should aim for at least 150 minutes of moderate-intensity activity every week, according to the NHS.
Eating a healthy, balanced diet, and watching how much alcohol you consume could also help you to lose weight.