SEHS Topic 13 Exercise & Immunity
Terms in this set (6)
function of immune system
Provides protection against infection and disease
Immunity that is present before exposure and effective from birth. Responds to a broad range of pathogens.
Physical: Skin, epithelial linings, mucosal secretions
Chemical: pH of body fluid, hormones and other soluble factors
Leucocytes: White blood cells
the ability to recognize and remember specific antigens and mount an attack on them
-Lymphocyte & antibody production
Effects of intense and long term training on the immune system
Intense exercise can cause tissue damage which is similar to those of an infection:
Increased leucocytes and inflammation
Long term training decreases the ability of adaptive and innate immune function . Long term training causes increased levels of cortisol and adrenaline which suppress the immune system.
Leucocytes numbers drop compared to sedentary people.
Relationship between exercise and susceptibility to infection
Athletes are more susceptible to infections than sedentary peers due to;
-Lower leucocyte numbers caused by the stress of exercise
-Inflammation due to tissue damage
-Greater exposure to airborne diseases due to increased breathing rate
Relationship can be seen as a J curve.
Strategies for minimizing infection
-Recovery time into training programmes
-Use of training logs
-Avoid contact with infectious people
-Maintain oral hygiene
-Ensure drinking water is clean
-Maintain good personal hygiene
-Eat a suitable and varied diet
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