chapter 6 - Exercise and the Immune System
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11 Terms
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B lymphocytes
Plasma cells that produce antibodies. Memory cells
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T lymphocytes
Killer T cells. Helper T cells
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Exercise can have a positive and negative effect on
upper respiratory tract infection (URTI)
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URTI
upper respiratory tract infection
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J-shaped curve
People who engage in regular moderate exercise are at lower risk of URTI
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Regular exercise reduces risk of URTI by how much
18–67%
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what type of exercise is beneficial
Resistance exercise
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factors associated with exercise
Less emotional stress
Better nutrition
Adequate sleep
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Exercise boosts
innate immune system
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Prolonged exercise
has depressive effect on immune system
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“Open window” of increased risk of infection
May be caused by high cortisol levels
Note 
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