How Much Exercise Does It Take to Boost Immunity?

Exercising may make our immune systems more than five times better at fighting infection. The immune-boosting effects may also be one of the reasons why it seems to help both prevent cancer and improve cancer survival.

For more on the benefit of exercise, check out:
• Exercise vs. Drugs for Depression ( )
• Longer Life Within Walking Distance ( )
• Standing Up for Your Health ( )
• How Much Should You Exercise? ( )

For the impact of exercise on weight loss, check out:
• The Exercise “Myth” for Weight Loss ( )
• The Secret to Weight Loss Through Exercise ( )
• Is It the Diet, the Exercise, or Both? ( )

Overexertion can increase risk of infection, but there are things we can do to mediate the effect. See, for example, Preserving Athlete Immunity with Chlorella ( ) and Preserving Immune Function in Athletes with Nutritional Yeast ( ).

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Thanks for watching. I hope you’ll join in the evidence-based nutrition revolution!
-Michael Greger, MD FACLM

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Dave McKinnon

  • @Addy_Hawaii says:

    I’m still in bed

  • @_anyone5962 says:

    What about over exercise? How much exercise will backfire, make you so tired and lower the immune response?

    • @zuffenhaussen says:

      @@_anyone5962 your body will tell: pain, injury, swollen tendons, unability to perform the workout well, etc.. Resting is also part of the equation.

    • @sudd3660 says:

      probably when you are tired, or when you get more sick. over training has those symptoms.

  • @steveguti6452 says:

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  • @steveguti6452 says:

    I would appreciate it Deeply if anyone could pray for me I’m very sick with chronic pain from long time illness please pray for me I’m suffering praying for everyone Everyday God bless you all

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    Urgent emergency please join me in prayer for all those affected families children animals massive life threatening Situations hurricane beryl massive wildfires massive heatwave in USA they desperately need your prayers please pray for them God bless you all

  • @manumaster1990 says:


  • @suemichaelsen8486 says:

    Thank you, Dr Greger. 75 ys old, walk 45 mins daily on treadmill, do 45 mins floor and standing exercise daily. 6 hrs of Tai Chi and Chi Kung weekly.

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  • @Mede_N says:

    Please include the sample sizes of the studies presented, as these are a good proxy for assessing the statistical power of the studies presented. (Nutrition literature – especially older literature – often lacks sufficient statistical power).

  • @adamd9418 says:

    “Exercise can potentially make our immune system 5x better at fighting infection…” – that’s reason enough for me to keep moving!

  • @Kgeorge86 says:

    Who of you by worrying can add a single hour to his life?

  • @michaelbalfour3170 says:

    Not hating or anything but what is all the Christian spam in the comments?

  • @AndrewPawley11 says:

    I love this channel!

  • @ericgeorge8449 says:

    A laughter study that uses Gallagher is *not* controlled for age of the participants.

  • @KJSvitko says:

    Most elderly people have problems getting up off the floor. As a child you spend a lot of time on the floor, adults do not.
    Doing yoga / stretching exercises on the floor can improve balance, mobility, flexibility and the ability to get up and down..
    Just getting up and down to the floor in a controlled manner is difficult for many older adults.
    Play with your children on the floor. Bend over, get down and pull weeds in your garden. Play with a pet on the floor.
    The more effort you make to work on balance and flexibility will pay dividends as you age.

  • @moresalad221 says:

    30 min a day of physical activity for 5 days a week. That’s the minimum recommended.

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