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Yr 12 workbook - energy system overview

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by

James Madigan

on 5 February 2015

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Transcript of Yr 12 workbook - energy system overview


Possible Tennis Training Program.
The
time
&
intensity
of activity determines which energy system is the dominate contributor to ATP production

As the activity time increases, the influence of the aerobic system increases.

The relative contribution of the three energy systems varies according to intensity &
time
/duration of activity.

Tennis ATP Production during a game
ATP- 70%

Lactic-20%

Aerobic- 10%
Contribution of Energy Systems to Physical Activities

Aerobic Energy System

This energy system is used for sub-maximal activities beyond two minutes. It is the most efficient energy system.

It creates 38 molecules of ATP from one molecule of glucose where as anaerobic glycolysis can only create two. The extra amount is possible because of the abundance of oxygen which allows a more complete breakdown glucose than occurs in anaerobic glycolysis.

Pyruvic acid, rather than becoming lactic acid, is further broken down in the citric acid cycle and the electron chain within the mitochondria to produce ATP used for exercise.

Aerobic Energy System

Anaerobic Glycolysis System
(1 glucose = 2 ATP)
This system provides the bulk of ATP production during
high intensity - sub-maximal efforts.

When a athlete has gone
beyond their maximum oxygen uptake level
(VO2 Max), the anaerobic glycolysis and aerobic systems share the task of creating ATP for the few minutes it will take the performer to stop from exhaustion.

It supplies ATP for
15 secs to 2mins
o
f maximal effort.

In the lactic system, glycogen stores within the muscle are brokendown to create ATP. A limited amount of O2 is used in the breakdown of glucose to ATP. Because of a lack of O2
pyruvic acid
is converted into
lactic acid
releasing Hydrogen ions (H+).

As lactic acid and hydrogen ions accumulate in the muscles during high intensity exercise
muscular

contractions are inhibited
. E.g. 400m sprint

The body can only tolerate increasing levels of lactic acid production until the lactic accumulation is greater than the body’s ability to remove it. This is called the
anaerobic threshold
. Once an athlete passes this threshold he must reduce or stop muscular effort.

Anaerobic Glycolysis System
(Lactic Acid System)

ATP: Pc -Energy Pathway (1 glucose = 1 ATP)
Phosphate Energy System (ATP: PCr)
ATP production in the Energy Systems
ATP Production & Resynthesis

ATP production during Physical Activity
ATP production during Rest Conditions
Sources of ATP
Energy Systems: Brief Summary
Energy Systems Workbook

Number of ATP Molecules made from one molecule of energy source.
Recovery
The abundance of O2 causes greater breakdown
Aerobic Energy Pathway
Energy Systems contribution to exercise.
ATP- AdenosineTriposphate release of energy.
Energy Systems in Tennis
Full transcript