Energy

How energy is generated for muscle contraction

Phosphagen System

10-15 seconds of exercise

1 CP generates 1 ATP

Uses both myokinase and creatine kinase

Myokinase

Transfer of R from 1 ADP to another, converting the ADP to ATP

Creatine kinase

Obtains P₃ from a phosphate storage molecule CP and gives it to the ADP

Anaerobic

2 minutes of energy

1 glucose generates 2 ATP

Glycolysis and fermentation

Continuous during exercise

When oxygen is not available, pyruvic acid is converted to lactic acid

Aerobic

Hours of energy

1 glucose generates 32 ATP

Takes place in the mitochondria

Oxygen debt

A temporary shortage of oxygen in the body following strenuous physical activity

Muscle glycogen

1-10 seconds of energy

ATP that is already stored in muscles and ready to use