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An Intro to Exercise Physiology

An Intro to Exercise Physiology. Everything starts with nerves…. Motor Learning. Perfect technique must be practiced Do the most important things at the start of practice Highly technical items can be dangerous if done while tired. Examples Olympic Lifting Last part of routines

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An Intro to Exercise Physiology

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  1. An Intro to Exercise Physiology

  2. Everything starts with nerves…

  3. Motor Learning • Perfect technique must be practiced • Do the most important things at the start of practice • Highly technical items can be dangerous if done while tired • Examples • Olympic Lifting • Last part of routines • What is the point of the workout… • 21 days to a new technique and 10,000 hours to perfect • Make sure the athlete is physically able

  4. Muscle Review • Type 1 • Oxidative, “slow twitch”, red muscle • Long duration activities • Type 2a • Fast twitch oxidative, white muscle • Moderately fatigue resistant fast twitch • Type 2b • Super fast twitch, white muscle • Fatigue instantly

  5. Questions that we may have the answers to…??? • When are each of those muscle types used? • Can you train to have more slow twitch muscle fibres? • Can you train to have more fast twitch muscle fibres? • Does the ratio of fast and slow twitch fibres you had at birth affect what you can do in life?

  6. What does you body use for energy • Carbs, Fats and Proteins – what we eat • Glucose – what our food is broken down into • ATP – all our working muscles really care about

  7. Exercise happens in the Cell • What do you know about the cell… • What in the cell is important for energy… • Why is the title statement for this slide correct…

  8. Breakdown of Energy currency Biochemical processes Carbohydrates Muscular Work Thermoregulation Fats Digesting Food Proteins The Chemistry of Energy Production • Energy in the human body is derived from the breakdown of complex nutrients like carbohydrates, fats, and proteins. • The end result of this breakdown is production of the adenosine triphosphate (ATP) molecule. • ATP provides energy necessary for body functions ATP

  9. The Energy Continuum • All your energy systems derive ATP • You are always using all 3 of your energy systems • You have the ability to quickly switch from one fuel source to another • You can train your body to use some of your fuel sources better than they originally were being used

  10. So exactly where does this energy come from? Cellular Respiration C6H12O6 +6O2 + 36 ADP + 36P 6CO2 + 36ATP + 6H20

  11. ATP Cycle Overview a) ATP breakdown b) Phosphorylation c) ATP resynthesis

  12. ATP + H2O ADP + Energy + P 2. Phosphate molecule (P) is released from ATP (ATP ADP) a) ATP breakdown (ATP turnover) 1. Hydrolysis of the unstable phosphate groups of ATP molecule by H2O 3. Energy is released (38-42 kJ, or 9-10kcal/ mol ATP)

  13. Molecule + P b) Phosphorylation Energy for muscle contraction 1. Energy released by ATP turnover can be used by body when a free P group is transferred to another molecule (phosphorylation)

  14. ADP + Energy + P ATP c) ATP resynthesis • Initial stores of ATP in the muscles are used up • very quickly and ATP must be regenerated 2. ATP is formed by recombination of ADP and P 3. Regeneration of ATP requires energy (from breakdown of food molecules)

  15. Energy Pathways

  16. The Energy Systems • the high energy phosphate system b) the anaerobic glycolytic system c) the aerobic oxidative system

  17. The Roles of the Three Energy Systems in Competitive Sport

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