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Trajectory Data Analyses for Pedestrian Space-time Activity Study
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Physical activity trajectories and mortality: population based cohort study.

Alexander Mok1, Kay-Tee Khaw2, Robert Luben2

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This summary is machine-generated.

Increasing physical activity over time significantly reduces mortality risk from all causes, cardiovascular disease, and cancer. Even starting from inactivity, meeting physical activity guidelines offers substantial longevity benefits for adults.

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Area of Science:

  • Epidemiology
  • Public Health
  • Gerontology

Background:

  • Physical activity is a key modifiable lifestyle factor influencing health outcomes.
  • Understanding the impact of physical activity trajectories on long-term mortality is crucial for public health interventions.

Purpose of the Study:

  • To investigate the prospective associations between baseline and long-term physical activity trajectories and mortality from all causes, cardiovascular disease, and cancer.

Main Methods:

  • A population-based cohort study of 14,599 adults (aged 40-79) from the UK.
  • Physical activity energy expenditure (PAEE) was assessed using questionnaires calibrated with objective measures.
  • Mortality data were collected up to 2016, with follow-up median of 12.5 years after last exposure assessment.

Main Results:

  • Long-term increases in PAEE were inversely associated with all-cause, cardiovascular disease, and cancer mortality, independent of baseline activity levels.
  • Each annual increase in PAEE equivalent to meeting WHO guidelines reduced mortality risks significantly.
  • Individuals with increasing physical activity trajectories showed substantially lower mortality risks compared to consistently inactive individuals.

Conclusions:

  • Middle-aged and older adults can achieve significant longevity benefits by increasing physical activity, regardless of prior activity levels or existing risk factors.
  • Consistent engagement in physical activity during mid to late life has considerable population health impacts.
  • Public health strategies promoting sustained physical activity can prevent a substantial proportion of deaths linked to inactivity.