What is ATP? ATP is a chemical compound responsible for producing energy for work, which is provided by our diet. When ATP is broken down, energy is released.

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Presentation transcript:

What is ATP? ATP is a chemical compound responsible for producing energy for work, which is provided by our diet. When ATP is broken down, energy is released. i.e. ATP → ADP + P ↓ ENERGY There are small amounts of ATP stored in all muscle cells, but only enough to provide energy for a few seconds of work. Stored glycogen must be broken down to provide working muscles with a regular supply of ATP. Glycogen comes from the food we eat (carbohydrates)

THE THREE ENERGY SYSTEMS ATP – CP Creatine Phosphate (Anaerobic) Oxygen is not present 1-15secs Anaerobic glycolysis Up to 3mins Anaerobic = No air = No Oxygen Aerobic = Air = Oxygen Oxygen is present Aerobic

Energy System Duration Source ATP - CP Immediate 1-15 seconds CP in muscles Anaerobic Glycolysis (lactic acid) Short term High intensity Up to 3 minutes Glycogen Carbohydrates Lactic acid produced Aerobic Long term Low intensity Unlimited Carbohydrates and then fats ATP replenished with o2

How do these energy systems inter-relate with one another? 2nd Gear (Anaerobic glycolysis) + Will keep you going for longer until you move into the next gear 1st Gear (ATP-CP) + Needed to get you going in a hurry - You can’t go very far 3rd Gear (Aerobic) + Can continue for longer periods of time - Can only run in this gear when the engine (heart) and radiator (lungs) are providing fuel (O2) to the car (body/muscles)

Energy systems in volleyball What energy system(s) would be used in volleyball? When are they used?

Long Term Effects of Exercise Circulatory System Increase in red blood cells More oxygen to the working muscles for aerobic energy production Resting heart rate and exercise heart rate decrease Muscle around heart gets bigger, thicker stronger walls Increase in heart volume More blood pumped around the body per minute and more oxygen to muscles Heart rate returns to normal sooner More efficient at doing its job

Long Term Effects of Exercise Respiratory System and Exercise Respiratory muscles increase in strength (diaphragm/intercostal muscles) Larger respiratory volume, more oxygen into lungs and into the blood Increase in number and size of capillaries at alveoli = greater diffusion of oxygen and carbon dioxide Breathing rate slows down

Long Term Effects of Exercise Muscle Muscles are larger are stronger Can cope with additional stress put through them. Receive more blood and therefore oxygen Increase number of mitochondria = increase in rate of energy production Increase in myoglobin = more oxygen stored in the muscles. More flexible Muscle memory