Life expectancy has seen significant increases over the past century, yet the number of years individuals can expect to live in good health—termed "healthspan"—has not necessarily followed suit. Recent research has highlighted this discrepancy, emphasizing the need to reassess how we understand aging and health in later life.
Gerontologists have introduced the concept of healthspan to evaluate the years we live free from chronic illness and disability. Data suggests that while life expectancy rose by 6.5 years from 2000 to 2019, healthspan only increased by 5.4 years, resulting in a growing gap between lifespan and healthspan. This gap is particularly pronounced in higher-income countries, where individuals are living longer but often experiencing more years burdened by health issues.
However, recent studies indicate a shift in this narrative. Researchers have begun using the notion of "intrinsic capacity," which measures an individual's ability to perform valued activities across several domains, including mobility and cognition. This approach has revealed that younger cohorts, particularly those born in the 1950s, exhibit higher intrinsic capacity than their predecessors, suggesting improvements in overall health and functionality as people age.
The findings point toward a potential compression of morbidity, where age-related health issues may manifest later in life rather than accumulating over time. Factors such as improved nutrition, better access to healthcare, and lifestyle changes are credited with these advancements.
While optimism exists regarding the health of future older adults, experts caution against generalizing these results across all populations and highlight that ongoing research is necessary to better understand trends in healthspan and intrinsic capacity. Encouragingly, individuals can take steps to enhance their healthspan through lifestyle modifications, such as maintaining a balanced diet and engaging in regular physical activity.