Aerobic exercise and mechanical efficiency

What would be practical implications for testing and knowing that someone has significantly lower economy of movement (mechanical efficiency) during running than they should?

Heart transplant and effects of exercise after the surgery

If a heart transplant removes all the nerves to the myocardium, how does cardiac output and heart rate increase during exercise?

Second law of thermodynamics

What are implications of the second law of thermodynamics for the measurement of energy expenditure?

Why someone is dizzy after doing a maximum lift exercise

What would cause a client to say to me after he completes a maximum lift standing press to say, " I feel slightly dizzy and see spots before my eyes." I am assuming that there is a physiological explanation for this? (I am thinking that there is a lack of blood to the brain.)

Exercise and weight loss

Why does regular low-intensity exercise stimulate greater body fat loss than high-intensity exercise of equal total caloric expenidture? (I assume one reason is that you can exerise for a longer duration at a lower intensity)