The alactic anaerobic energy system described above is the first system recruited for muscle contraction and can last for only about 10 seconds of intense exercise after which the lactic anaerobic and aerobic energy systems become the main contributors to ATP production.
In contrast to
the alactic anaerobic energy system, which uses ATP stored from previous cellular respiration in combination with a PCr phosphate buffer, the lactic anaerobic energy system must directly recruit the active cellular respiration process to provide ATP energy.
Once the PCr stored in your muscles runs out
the alactic anaerobic energy system will not provide further ATP energy until your muscles have rested and been able to regenerate their PCr levels.
Essentially, this system is dominant when
your alactic anaerobic energy system is depleted but you continue to exercise at an intensity that is too demanding for your aerobic energy system to handle.
Not exact matches
During continuous aerobic exercise your intensity level, relative to the high intensity levels that recruit your
alactic anaerobic and lactic
anaerobic energy systems, must be reduced so that the
energy demand placed on your muscles equals the
energy supply (compare this to the
alactic anaerobic and lactic
anaerobic systems, where demand usually exceeds supply and
energy stores are quickly depleted).
We know that rugby union is classed as an
Alactic - Aerobic Sport; which means the prime
energy system involvement is purely aerobic, with short bouts of
anaerobic activity.
Read this article to learn about the
alactic anaerobic, lactic
anaerobic, and aerobic exercise
energy systems.
This method of ATP generation is called the
alactic (this word means «without lactic acid»)
anaerobic (this word means «without oxygen»)
energy system, and it is one of three Exercise Energy Systems that your body can recruit to generate ATP while you exe
energy system, and it is one of three Exercise
Energy Systems that your body can recruit to generate ATP while you exe
Energy Systems that your body can recruit to generate ATP while you exercise.