Assignment 2

1. Energy systems and their use
in sport and exercise
activities.

2. phosphocreatine
• This is a molecule that quickly gives off a high energy phosphates in
skeletal muscles and the brain.
• Phosphocreatine brings back small amounts of ATP very quickly so it
is boosting exercises or activities that are shorter. muscles are less
likely to become weaker and will be easier to do more active
exercises. Also, activities which include weight training, short sprints
and repeated jumping will all be improved. This is good for athletes
who are in sport as they will be able to compete better and at higher
levels. Sports that this could benefit are weightlifters, long jumpers
and high jumpers.

3. Lactic acid system
• Lactic acid is used mostly by athletes to describe the intense pain felt
during tiring exercises like in event which include 400 and 800 metres.
When energy is needed to perform exercise it is supplied from the
breakdown of ATP. The lactic acid system can release energy to
process ATP without using oxygen and this is called anaerobic
glycolysis.
• Lactic acid is not a waste product neither is it the cause of leg burn
when exercising at a fast pace.

4. Aerobic energy system
• The aerobic energy system uses fats, carbohydrate and sometimes
proteins for re-synthesising ATP for energy use.
• The aerobic system produces much more ATP than any of the other
energy systems but it produces the ATP much more slowly so it
cannot take exercise that needs the fast production of ATP.
• Sports that could use this are rowing and hockey