The heart is the most reliably working organ in your body — beating approximately 100,000 times every day from before birth until death, without ever taking a break. Over a lifetime, the cardiovascular system undergoes gradual but significant changes.
Maximum heart rate declines predictably with age — the widely-used estimate is 220 minus your age in beats per minute. More significantly, cardiac output — the volume of blood the heart can pump per minute — also declines, at roughly 1% per year after age 30. For most people this is imperceptible in daily life but becomes noticeable during intense exercise.
Arteries naturally stiffen with age as elastin fibres break down and calcification occurs. Lifestyle factors — particularly smoking, high blood pressure and sedentary living — accelerate this process significantly. Arterial stiffness is an independent predictor of cardiovascular events.
Cardiovascular disease is the UK's leading cause of death, but up to 80% of cases are considered preventable through lifestyle modification. The most impactful changes: quitting smoking, regular aerobic exercise, maintaining a healthy weight, controlling blood pressure, and following a Mediterranean-style diet.
Quitting smoking produces one of the fastest measurable health improvements — within just 1 year of quitting, the risk of coronary heart disease drops to half that of a continuing smoker.