12. Work Physiology.

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Presentation transcript:

12. Work Physiology

MUSCLE STRUCTURE AND METABOLISM

Muscle Structure Figure 12.1 The structure of muscle

Aerobic and anaerobic Metabolism

Aerobic and anaerobic Metabolism Phosphagen (ATP - CP) System ATP  ADP + P + Energy CP  C + P + Energy (rebound ADP and P to ATP)  most rapid means of replenishing ATP in the muscle cell

Anaerobic Anaerobic Glycolysis System – oxygen debt Glucose (C6H12O6)n  Lactic acid (2C3H6O3) + E Energy + 3ADP + 3P  3ATP Aerobic Reaction – steady state C16H32O2 (carbohydrates and fatty acids) + 23O2  16CO2 + 16H2O + Energy 130 ADP + 130P + Energy  130ATP

CIRCULATORY AND RESPIRATORY STSTEMS

The Circulatory Systems The Blood Structure of Cardiovascular system

Blood Flow and Distribution

The Respiratory Systems The Structure of the Respiratory system

Lung Capacity

ENERGY COST OF WORK AND WORKLOAD ASSESSMENT

Energy Cost of Work

Working Metabolism Resting-level Metabolism

Measurement of Workload Oxygen Consumption Heart Rate Blood Pressure and Minute Ventilation Subjective Measurement of Physical Workload (Borg’s RPE)

BORG’S RATED PERCEIVED SCALE (1985) 6 7 VERY, VERY, LIGHT 8 9 VERY LIGHT 10 11 FAIRLY LIGHT 12 13 SOMEWHAT HARD 14 15 HARD 16 17 VERY HARD 18 19 VERY, VERY, HARD 20

PHYSICAL WORK CAPACITY AND WHOLE-BODY FATIGUE

Short-Term and Long-Term Work Capacity

Causes and Control of Whole-Body Fatigue

Static Work and Local Muscle Fatigue

Corlett and Bishop (1976) Body Part Discomfort (BPD) Scale

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