energy transfer - long duration

Question 1

why does low intensity and long duration exercise use the aerobic system

Answer 1

because the demand for oxygen can easily be met and glucose can be broken down much more efficiently when oxygen is present

Question 2

oxygen consumption

Answer 2

the amount of oxygen we use to produce ATP usually referred to as VO2

Question 3

VO2 max

Answer 3

the maximum volume of oxygen that can be taken up by the muscles per minute

Question 4

sub-maximal oxygen deficit

Answer 4

when there is not enough oxygen available at the start of exercise to provide all the energy (ATP) aerobically

Question 5

explain sub-maximal oxygen deficit

Answer 5

• at the start of exercise insufficient oxygen is distributed to the tissues for all energy to be provided aerobically.
• Because it takes time for circulatory system to respond to the increase in demand for oxygen and it also takes time for mitochondria to adjust to rate of aerobic respiration.
• Therefore energy is provided anaerobically to satisfy the increase in demand for energy until the circulatory system and mitochondria can cope = sub-maximal oxygen deficit

Question 6

maximum oxygen deficit

Answer 6

• gives an indication for anaerobic capacity