Links between aerobic and anaerobic systems

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Physical Education - Links between aerobic and anaerobic systems

Links between aerobic and anaerobic systems

Links between aerobic and anaerobic systems.

The complex relationship between the aerobic and LA energy systems starts
with the conversion of glucose to pyruvic acid. There is a small amount of
energy given off here (which is used for ATP production). From there, there
are two choices. If the energy required is needed in a hurry (i.e. an
explosive or high intensity movement); the pyruvic acid is immediately
broken down into lactic acid and energy is produced, with lactic acid being
the by-product. However, if the energy required is not needed quickly, it
will move into the Krebs cycle [1]. The Krebs cycle is a complex series of
chemical reactions. Think of it like a wheel going around that can change
speed on demand. As the Krebs cycle [2] goes around, oxygen enters at this
point. In addition, fat can also enter and be broken down (this happens
when the energy requirements of the muscles are low, i.e. walking). A
result of the Krebs cycle is CO2. Once the Krebs cycle is complete, the
remaining products move into the electron transport system, where the rest
of the breakdown occurs. The end result is H2O. Notice that energy is
produced in both the Krebs cycle [3] and electron transport system.

So, to a large extent, the amount of energy the aerobic system is able to
produce is determined by how fast the Krebs cycle is able to spin around.
This, in turn, is dependent on the amount of oxygen being delivered to the
muscles.

The amount of oxygen we can take in and use for energy production is
called oxygen uptake. If we can increase the O2 uptake, we increase the
capacity of the aerobic system and the amount of energy it is able to
produce. As a definition, it is the capacity of the circulatory and
respiratory systems to take in, deliver and utilise oxygen. Oxygen uptake
can also be referred to as .

The maximal amount of oxygen that we can take in and use for energy
production in the aerobic system is called

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[1] http://alison.com/#
[2] http://alison.com/#
[3] http://alison.com/#