My Class

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IE 553 Engineering of Human Work Dr. Andris
Freivalds Class 23
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IE 553 Engineering of Human Work Dr. Andris
Freivalds Class 23
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Control Chart
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Physiological Changes During Work

• (quick)? sympathetic ? parasympathetic
• (later) local auto-regulation ( gt 1)
• Massive redistribution of blood flow
• Generation of heat
• Secondary vasodilation
• Fluid accumulation in active muscle

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HR vs. Workload

• HR correlated with work stress
• Physical workload
• Mental workload
• Heat stress
• Fatigue
• Static work vs. dynamic work
• Pressor response
• Pooling of blood, fainting

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HR and Fatigue

• Heart rate creep
• Brouha criterion

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HR vs. Age and Gender

• Predict max HR
• HR ? with age
• HRm 220 Age
• HRm 209 0.7 Age
• HRm 217 0.876 Age
• HRm 190 0.667(Age-25)
• Female gt males

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HR vs. Training

• Training ? HR, ?CO, ? VO2
• Min program 30 min, 3x a week

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Cardiovascular Diseases

• Stenosis narrowing of arteries
• Atherosclerosis thickening of artery walls
• Arteriosclerosis hardening of arteries
• Thrombosis blocking of blood vessels
• Heart attack death of muscle (infarction)
• Stroke occlusion of blood flow in brain
• Fibrillation- random beating of cardiac muscle

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Coronary Heart Disease

• Age
• Gender (male)
• Smoking
• Heredity (race)
• Diabetes
• Lack of exercise
• Obesity
• High blood pressure
• Cholesterol