Andrew Huberman· PhD
for instance people that do bouts of walking each day for about 60 Minutes brisk walking experience increased te- cell function so that's an immune cell that goes out and combats cold and flu viruses and natural killer cell activity so those increase increase macras function you are now familiar with these cells if you don't know exactly what they do just keep in mind that you heard about these in the context of what the innate immune system does to go out and fight colds and flu cyto coses increase but not dramatically okay so this is a mild inflammation response stress hormones such as cortisol epinephrine norep nephrine also called adrenaline and noradrenaline those are deployed as well