The Secrets of Ageing Better | Future Lives | u3a UK

Chronologie de l'épisode

1. 0:00

   Ageing populations and the widening gap between life expectancy and healthy life expectancy

   • The UK's over-85 population doubled to 1.4 million in 25 years, and centenarian telegrams rose from 9 in 1917 to 13,500 in 2021, showing dramatic gains in lifespan.
   • Healthy life expectancy stopped keeping pace with total life expectancy in the early 1990s, so men now spend about 16 years and women 19 years in ill health.
   • Life expectancy varies by up to nine years across just eight stops on Birmingham's Cross City line, showing how strongly socioeconomic factors shape ageing.
2. 5:38

   Defining biological ageing and why it should be treated as a shared root cause of disease

   • Biological ageing is defined as becoming increasingly frail over time, reducing the ability to cope with stress such as a fall or hip fracture and increasing disease and death risk.
   • Age-related diseases like arthritis, heart disease and cancer are currently researched and treated separately, but if ageing is their shared primary cause, targeting ageing itself could be more effective.
   • Only about 20 percent of how long and how well you live is genetic; the major influences are lifestyle and a clean environment, with fetal environment also playing a role.
3. 11:39

   Evolutionary mismatch: modern sedentary lifestyles outpace our biology

   • Life expectancy swung between 30 and 40 years until about 150 years ago, and has risen so fast that evolution has not had time to adapt our biology to modern lifestyles.
   • Compared with hunter-gatherers, modern humans are far more sedentary with desk jobs and constant food availability, which the speaker argues is a major driver of ageing.

Concepts clés

• healthy life expectancy— The gap between total lifespan and years spent in good health is the central problem the talk addresses.
• caloric restriction— Reducing calorie intake by 25-30% is shown to extend lifespan and healthspan in primates and likely humans.
• senescent cells— These 'zombie' cells accumulate with age, cause inflammation, and are a primary driver of biological ageing.

Citations remarquables

• in that 25-year period we acquired another 1.7 million over 65 year olds but the group that are actually growing at the fastest rate are the guys here in the dark blue these are the over 85s and in Asian research we call these folks the oldest old and their numbers doubled in that 25-year period to 1.4 million

  🤯

  — The scale of population ageing is staggering—the oldest old are the fastest-growing group, doubling in just 25 years.

  Aller à 0:42

• George sent out only nine telegrams in 1917. but Queen Elizabeth last year sent out 13 and a half thousand so in just over a hundred years we've had an enormous increase in those reaching the the landmark of 100 years

  🤯

  — The 1,500-fold increase in centenarian telegrams vividly illustrates the dramatic rise in human lifespan.

  Aller à 1:25

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