Caitlin Walton Unit 4 Assignment 3

	Anaerobic	Aerobic
Oxygen	No	Yes
Intensity	80-100%	50-80%
Duration	About 20 seconds	Hours
Activities	Sprint Tennis Long Jump                            High Jump	Marathon

What is the difference between aerobic and anaerobic activity?

Anaerobic is working  at a fast pace with no oxygen so it runs out really quickly. Aerobic is the opposite. You are working at a slow pace with oxygen so you can keep going for longer. 

Explain why some activities are more aerobic/anaerobic?

Sports like 100 meter sprint only lasts for a short amount of time and is over very quickly so only use the anaerobic system. However, if you are taking part in a marathon, you will be using the aerobic system because you are going for a long time at a slow pace. 

Why do some sports require both systems?

Sports like football require both systems. This is because you are exercising for the whole 90 minutes because when you have the ball you may have to do short fast bursts of exercise; sometimes your jogging and sometimes your walking.

How does the position you play in football affect which energy system you use?

If you play midfield, you are using more aerobic because you have to run up and down the pitch for the majority of the game. However, if you are a defender you do more short sprint.

How does football and 1500m use both anaerobic and aerobic energy systems?

Oxygen provides the catalyst for a chemical reaction in our muscles (including the heart) that generates aerobic energy. If it were not for other factors – such as insufficient muscle fuel (notably, carbohydrate or, more specifically, glycogen) over-heating and dehydration, we could theoretically continue to exercise aerobically indefinitely.

It would seem reasonable to assume that during a football game all three energy systems would be required, as intensity varies from low to very high. However, because it is not obvious just how fast, how many and how long the sprints are, and just how easy and how long the intervening periods are, it is difficult to determine which of the energy systems are most important. Thus most of the football-related research has attempted to tackle this problem.

1500m uses the aerobic system the most because it only lasts for about 5 minutes. Although it might use anaerobic when you run your fastest across the finish line. Also, when you first start exercising you are using the anaerobic system that then turns into the aerobic system.

Anaerobic - ATP-CP
This system uses creatine phosphate and has a very rapid rate of ATP production.  The total amount of CP and ATP stored in muscles is small, so there is limited energy available for muscular contraction.

Anaerobic - Lactic Acid
Anaerobic glycolysis does not require oxygen and uses the energy contained in glucose for the formation of ATP. This pathway occurs within the cytoplasm and breaks glucose down into a simpler component called pyruvate.

Aerobic
This pathway requires oxygen to produce ATP, because carbohydrates and fats are only burned in the presence of oxygen. This pathway occurs in the mitochondria of the cell and is used for activities requiring sustained energy production.
Aerobic glycolysis has a slow rate of ATP production and is predominantly utilized during longer-duration, lower-intensity activities after the phosphagen and anaerobic systems have fatigued.