Estimated functional capacity predicts mortality in older adults

Area of Science:

• Gerontology
• Cardiovascular Health
• Preventive Medicine

Background:

• Cardiorespiratory fitness (CRF) is a key indicator of functional capacity.
• Assessing CRF's impact on mortality in older adults is crucial for public health.
• Previous research highlights the general benefits of physical activity for longevity.

Purpose of the Study:

• To investigate the association between cardiorespiratory fitness (CRF) and mortality risk in adults aged 60 and older.
• To determine if CRF is an independent predictor of mortality in this age group.
• To provide evidence supporting physical activity promotion in older populations.

Main Methods:

• Prospective study with an average follow-up of 13.6 years.
• Utilized data from 4,060 adults (24.7% women, mean age 64.6) attending a preventive medical clinic.
• Quantified CRF using metabolic equivalents (METs) from maximal treadmill tests, categorizing participants into low, moderate, and high fitness groups.

Main Results:

• A significant inverse relationship was observed between CRF levels and all-cause, cardiovascular disease (CVD), and cancer mortality.
• Individuals with high CRF exhibited substantially lower mortality risks compared to those with low CRF (all-cause HR=0.59, CVD HR=0.57) after adjusting for multiple risk factors.
• Adjusted death rates per 1,000 person-years for all causes were 30.9 (low CRF), 18.3 (moderate CRF), and 13.4 (high CRF).

Conclusions:

• Cardiorespiratory fitness (CRF) is a significant and independent predictor of mortality in older adults.
• The findings reinforce the importance of promoting physical activity for substantial health benefits in the elderly, including the very old.
• Higher levels of physical fitness are associated with reduced risk of death from all causes and cardiovascular disease.