Energy Transfer in PA

Lactate threshold occurs at a ________ percentage of VO2max in trained athletes compared to untrained individuals.

• Higher

• Lower

The maximal amount of oxygen that can be taken up and utilized by the skeletal muscle during maximal intensity exercise is called:

• Lactate threshold

• Onset of blood lactate

• Ventilatory threshold

• VO2 max

What fiber type is characterized by a rapid contraction speed, can output very high levels of force, and has a high capacity for anaerobic ATP production in glycolysis?

• Type I

• Type II

• None of the above

Which type of exercise would likely contributed to the largest total oxygen uptake during recovery (assume the duration of exercise is the same for all)?

• Light-intensity exercise

• Moderate-intensity exercise

• All-out maximal intensity exercise

• All of the types listed would contribute to the same total amount of recovery oxygen uptake

When compared to untrained individuals, trained individuals have a smaller oxygen deficit and faster rate of recovery oxygen consumption at the same absolute intensity.

• True

• False

Excess-post exercise oxygen consumption (EPOC) can be partially explained by:

• The need to replenish high-energy phosphates depleted by exericse

• The restoration of oxygen to blood, tissue fluids, and myoglobin

• The oxidation of blood lactate in energy metabolism and resynthesis of lactate to glycogen

• All of the above

The difference between the total oxygen consumed during physical activity and an additional amount that would have been consumed if a steady-rate aerobic metabolism occurred immediately at the initiation of activity is called:

• Oxygen deficit

• Excess post-exercise oxygen consumption

• VO2 max

• Ventilatory threshold