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ENERGY SYSTEMS

ENERGY SYSTEMS. FOOD TO FUEL. Energy in the human body come from the breakdown of nutrients like carbohydrates, proteins and fats Food = Energy (ATP) The end result of this breakdown is the production energy in the form of Adenosine triphosphate (ATP). ENERGY PATHWAYS.

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ENERGY SYSTEMS

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  1. ENERGY SYSTEMS

  2. FOOD TO FUEL • Energy in the human body come from the breakdown of nutrients like carbohydrates, proteins and fats Food = Energy (ATP) • The end result of this breakdown is the production energy in the form of Adenosine triphosphate (ATP)

  3. ENERGY PATHWAYS • ATP provides energy necessary for body function. • Because the body can not easily store ATP it is necessary to continually create ATP during exercise.

  4. ENERGY PATHWAYS • In general, the two major ways the body converts nutrients to energy are: • Aerobicmetabolism (with oxygen) • Anaerobicmetabolism (without oxygen) • There is a total of 3 Energy systems that interplay to supply the fuel needed for exercise, with the intensity and duration of the exercise determining which method gets used when.

  5. ENERGYSYSTEMS • The 3 energy systems are: 1) ATP-PC System (Anaerobic without oxygen) 2) Anaerobic Glycolysis(Anaerobic without oxygen) 3) Aerobic (Aerobic with oxygen)

  6. ATP-CP SYSTEM • The ATP-CP energy pathway (sometimes called the phosphate system) uses ATP CP stores directly. • This pathway doesn't require any oxygen to create ATP. • When is it used? supplies about 10 seconds worth of energy and is used for short bursts of exercise such as a 100 meter sprint. • It first uses up any ATP stored in the muscle (about 2-3 seconds worth) and then it uses creatine phosphate (CP) to resynthesize ATP until the CP runs out (another 6-8 seconds). • After the ATP and CP are used the body will move on to either aerobic or anaerobic metabolism (glycolysis) to continue to create ATP to fuel exercise.

  7. ATP-PC System Chemical Process • ATP  ADP + “energy” (2-3 secs) • ADP + CP  ATP + C (4-10 secs)

  8. ATP-CP SYSTEM

  9. Put it to the test…. • To test the ATP-CP system we use muscular power. • Bicep Curl 1RM (repetition maximum)

  10. ANAEROBICGLYCOLYSIS • The anaerobic energy pathway, or glycolysis, creates ATP exclusively from carbohydrates • Creates this ATP without the need of oxygen • Lactic acid and Hydrogen ions are by-product of this system. • When is it used? Anaerobic glycolysisproduces energy for short, high- intensity bursts of activity lasting no more than several minutes before the lactic acid build-up reaches a threshold known as the lactate threshold and muscle pain, burning and fatigue make it difficult to maintain such intensity.

  11. ANAEROBIC GLYCOLYSIS

  12. Anaerobic Chemical Process

  13. LACTATE THRESHOLD • Lactic acid threshold is the common term used when the level of lactate acid nad H+ within the bloodstream and working muscles is above which an individual cannot continue to physically exersise at a desired level. • Trained athletes can increase their tolerance to LA accumulation and are able to continue effective performance or training with much higher lactate and H+ levels in their working muscles and circulatory system.

  14. Put it to the Test…. • To test this system in class we use muscle endurance exercises • Pushups, Situps, and Lunges for 2 minutes.

  15. AEROBIC SYSTEM • Aerobic system fuels most of the energy needed for long duration activity. • It uses oxygen to convert nutrients to ATP. • This system is a bit slower than the anaerobic. • Relies on the circulatory system to transport oxygen to the working muscles before it creates ATP. • When is it used? Endurance events, less intense activities, that last long periods of time. • This system creates 38 molecules of ATP from 1 molecule of gluscose

  16. AEROBIC SYSTEM

  17. Aerobic System Chemical Process Fats ( and O2) + Protein(emergency ATP source) ATP for Muscles ATP for Muscles

  18. Put it to the test….. • To test this system we use cardiovascular endurance • perform the 12 minute walk run and record the distance covered in 12 minutes.

  19. ENERGY SYSTEM FOR SELECTED SPORTS

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