This document discusses different energy systems in the body: - Anaerobic respiration produces energy without oxygen and includes the ATP-PC and lactic acid systems. The ATP-PC system uses phosphocreatine to rapidly produce ATP in the first 2-7 seconds of intense exercise. - The lactic acid system breaks down glucose to produce ATP through anaerobic glycolysis during high-intensity activities up to 2 minutes. This produces lactic acid. - The aerobic system uses fats, carbs and proteins to slowly but sustainably produce ATP through oxygen. It has virtually unlimited capacity for endurance activities.

1. Energy Systems
By Ethan Brown

2. The energy
from the sun
transfers
down onto
the cow
The energy goes
from the grass to
the cow from
eating it
The cow gives
the man energy
to move
Quick Summary Of Energy
Transfer

3. What Are Energy Systems
Anaerobic respiration is when the body produces energy
for exercise without oxygen (exercise over long periods of
time or long distances). The anaerobic energy system
kicks in in the first few minutes of all exercise, before
there is sufficient oxygen available at the muscles for
aerobic metabolism. It is also used for fast, powerful
bursts of energy, for which the aerobic system is
insufficient. There are two systems within Anaerobic
metabolism, which are the ATP-PC system and the lactic
acid system.

4. Phosphocreatine
Phosphocreatine is a molecule that serves as a
rapidly mobilized reserve of high-energy
phosphates in the skeletal muscles and the brain to
recycle adenosine tri phosphate; which is the
energy currency of the cell. Phosphocreatine can
anaerobically donate a phosphate group to ADP to
form ATP during the first two to seven seconds
following an intense muscular or mental effort. As it
is anaerobic it is used during short bursts of exercise
such as 100-200m sprinting

5. Lactic Acid System
The lactic acid system is an anaerobic energy system in
which the high-energy compound adenosintriphosphate
(ATP) is manufactured from the breakdown of glucose to
pyruvic acid in the muscle cells. In the course of the
process, known as anaerobic glycolysis (the splitting of
sugars), chemical energy is released and used to
synthesise two ATP molecules for each glucose molecule
metabolised. During high-intensity activities, such as
sprint races, lasting up to about two minutes or for the
first 40 seconds or so of less intensive exercise, the body
uses the lactic acid system for energy.

6. Aerobic Energy Systems
The aerobic energy system utilises fats,
carbohydrate and sometimes proteins for re-
synthesising ATP for energy use. The aerobic
system produces far more ATP than either of the
other energy systems but it produces the ATP much
more slowly, therefore it cannot fuel intense
exercise that demands the fast production of ATP.
While the aerobic system doesn’t produce nearly as
much power as the other systems, a major feature
is its capacity which is virtually limitless, as it just
keeps on producing ATP.

7. The Graph Analysis
From this graph I can see that Tim got off too
quite a slow start only doing 0-10m in 1.89
seconds. As the race went on we can see that
Tim got gradually quicker besides the last 10m
where he got 0.88 seconds which is 0.04
seconds slower than his average time for 10m.
Tim finished the race in 9.78 seconds.

8. The Graph