One tenth of 50-year-old men have a 10-year-old heart age greater than they are, increasing their risk of a fatal heart attack or stroke, a study suggests.
Public Health England's analysis is based on the responses of 1.2 million people to its Heart Age Test: 33,000 men aged 50 years.
The organization also predicts that 7,400 people are dying of heart disease or stroke alone this month.
Cardiac disease is the main cause of death for men and the second cause of death for women.
"Adjustment to our risk of heart disease and stroke should not be left until we are older," said PHE's cardiovascular disease leader Jamie Waterall.
How to Improve Your Heart Health:
- Stop smoking
- Either active
- Manage your weight
- Eat more fiber
- Reduce saturate fat
- Get your five days of fruits and vegetables
- Reduce salt
- eat fish
- Drink less alcohol
- Read labels on food packaging and beverages
PHE said half of respondents do not know their blood pressure and that 5.6 million people in England currently have high blood pressure without knowing it.
This is "extremely disturbing", so Dr. Mike Knapton from the British Heart Foundation.
"These silent conditions can lead to a fatal heart attack or stroke if left untreated," he said.
A new version of the test on the BHF website gives users back to applications and others
Resources to help them test their blood and improve their health.
Put your blood pressure "can be the first important step to extend your life," said Katherine Jenner of Blood Pressure UK.