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Updated: Feb 5, 2026

Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption
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Nutritional and Physical Activity Interventions to Improve Immunity.

Glen Davison1,2,3, Corinna Kehaya1,2,3, Arwel Wyn Jones1,2,3

  • 1School of Sport and Exercise Sciences, University of Kent, Kent, UK (GD, CK).

American Journal of Lifestyle Medicine
|September 12, 2018
PubMed
Summary

Regular moderate physical activity boosts immunity and reduces infection risk. A balanced diet is key for nutrients; supplements are generally not recommended unless deficient.

Keywords:
dietexerciseimmunosenescencemicronutrientssupplements

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Area of Science:

  • Immunology
  • Nutritional Science
  • Public Health

Background:

  • Upper respiratory tract infections are common, impacting health and economy.
  • The role of lifestyle factors like physical activity and nutrition in immunity is often underestimated.

Purpose of the Study:

  • To review the impact of physical activity and nutrition on immune function.
  • To provide evidence-based recommendations for enhancing immunity through lifestyle choices.

Main Methods:

  • Literature review of studies on physical activity, nutrition, and immunity.
  • Analysis of evidence for various nutritional strategies and supplements.

Main Results:

  • Regular moderate physical activity enhances immune function and lowers infection risk.
  • A balanced diet rich in fruits and vegetables is recommended; supplementation is generally advised only for deficiencies.
  • Some supplements like probiotics and certain plant extracts may offer benefits in specific contexts.

Conclusions:

  • Promoting regular moderate exercise and a balanced diet are primary strategies for immune support.
  • Caution and individualized assessment are advised regarding nutritional supplementation.