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Estimating changes in physical behavior during lockdowns using accelerometry-based simulations in a large UK cohort.

Craig Speirs1,2, Malcolm Granat3, Emmanuel Stamatakis4

  • 1PAL Technologies Ltd, Glasgow, UK.

Scandinavian Journal of Medicine & Science in Sports
|August 11, 2021
PubMed
Summary
This summary is machine-generated.

COVID-19 lockdowns significantly reduced physical activity, leading to fewer steps and more sedentary time. These changes in physical behavior during restrictions have serious health implications, impacting public health policy.

Keywords:
COVID-19accelerometerybirth cohortlockdownphysical behaviorstepping

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Area of Science:

  • Public Health
  • Epidemiology
  • Behavioral Science

Background:

  • COVID-19 restrictions limited outdoor activity, potentially impacting physical behavior.
  • Objective data on these physical behavior changes during lockdowns is scarce.
  • Understanding these changes is crucial for public health during pandemics.

Purpose of the Study:

  • To quantify changes in physical behavior during COVID-19 full lockdown conditions.
  • To estimate the impact of restrictions on daily activity levels using objective data.
  • To analyze the relationship between reduced stepping and increased sedentary time.

Main Methods:

  • Utilized objective data from thigh-worn activity monitors from 6492 individuals in the 1970 British Cohort Study (2016-2018).
  • Classified days into 'indoor only', 'indoor and exercise', and 'outdoor active' based on walking bout characteristics.
  • Compared physical behavior metrics (steps, sedentary time, lying, standing, stepping) across classified day types.

Main Results:

  • 'Indoor only' days showed significantly fewer steps (-6590 steps/day) and longer sedentary (+1.5h) and lying (+1.4h) times compared to 'outdoor active' days.
  • 'Indoor and exercise' days also had fewer steps than 'outdoor active' days.
  • Reduced daily stepping and increased sedentary time are strongly linked to adverse health outcomes.

Conclusions:

  • COVID-19 lockdowns drastically altered physical behavior, characterized by reduced steps and increased sedentary time.
  • These objective findings highlight significant public health concerns associated with pandemic-related restrictions.
  • Implications for public health policy and messaging during future pandemics are substantial.