Adaptations to chronic endurance training: increase capillary density increase oxidative enzymes increase mitochondrial density

TR individual reach Steady State more rapidly than UNTR why?

Submaximal work: TR and UNTR will have the same oxygen cost TR will exercise at lower HR TR will exercise at lower intensity

Fat catabolism during low intensity exercise

low intensity: 5 kcal/min most (72%) derived from fat 3.6 kcal from fat, 0.4 gms of fat

double intensity: 10 kcal/min 45% of energy is derived from fat 4.5 kcal/min, 0.5 gm of fat

e.g., 5 kcal/min for 60 min = (5 X 60) = 300 kcals, 24 gm fat

10 kcal/min for 45 min = 450 kcals, 22.5 gm fat

Therefore, should you encourage some one to exercise at low intensity to “burn more fat”?????

Fat facts: fat utilization decreases when exercise follows a high CHO meal (increase in circulating insulin) fat utilization decreases when lactate begins to accumulate ability to use fat as a fuel increases with training