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An Intro to Exercise Physiology

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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 ... – PowerPoint PPT presentation

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Title: An Intro to Exercise Physiology


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
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
  • 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
  • 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
  • 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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