They dont get sufficient oxygen to support the electro transport chain
Lactate
The transfer of H ions from the NADH produced during glycolysis to pyruvate to produce lactate
ATP production
Lactate accumulates and muscle fatigue occurs
Oxygen debt
Exercise is complete
Provide the energy to convert lacyate nack to pyruvate and glucose in the liver
Relatively slowly but can sustain contractions for longer
Long distance running, cycling and cross country skiing.
Aerobic respiration to generate ATP
Mitochondria
Myoglobin
Fats
Relatively quicky over short periods
Sprinting or Weightlifting
Glycolysis only
Mitochondria
Blood supply
Glycogen