Post on 14-Jan-2016
transcript
Preparatory Lecture
Anaerobic energy systems
Today
General comments and instructions Information Procedure Results Questions Discussion
Group time to make decisions
General comments
What are your impressions of the labs so far? Aim of labs- apply theory to practice Use of voice- how (projection, tone etc) and
what you say Explanations- make clear Instructions- Be direct Participants- identify beforehand, ensure
ready Rest of the class- must be actively involved
Your lab
Participants will complete Wingate test 30 seconds all out maximal effort Lactate tests pre, post test and follow up Use measurements to calculate peak power
etc. Decisions in blue
InformationExplain things differently!!!
Anaerobic energy systems Definitions EPOC Sources of fatigue Metabolic by-product removal
Anaerobic energy systems
ATP-PC <8 seconds How?
Anaerobic glycolysis <3 minutes How?
Definitions
Speed Power Work Velocity
Use glossary- give examples
Recovery-EPOC
O2 consumption remains elevated
O2 Dept = payment for O2 deficit
Pg 118 text
Sources of Fatigue- p 113 text PCr depletion Muscle glycogen depletion Neuromuscular- nerve impulses CNS- muscle recruitment Metabolic by-products
Lactate Hydrogen ions low ph Buffers- bicarbonate
Metabolic by product removal Metabolic by-products
Lactate- removed by Gluconeogenesis- (conversion to glucose) through Cori cycle (energy consuming) or Oxidation to pyruvate which fuels citric acid cycle (energy producing)
Hydrogen ions removed by buffers such as bicarbonate
Preparation
Participants Clothing Fluids Food, alcohol, tobacco, caffeine Avoid strenuous exercise immediately before Sleep
Warn about approximate body weight Decide- gender/trained/same
Assistants
Timer- stopwatch Force Setter- calculate using grey box p 59 lab
manual Revolutions- rpm/12 = revs in 5 seconds Heart rate monitor monitor Recorder Lactate measurement (2 people)Decide- will they be the same for all 4 athletes?How will you designate assistants?What will the other class members do?
Equipment
1 bike! Heart rate monitor Stopwatches calculator Lactate
Practice
Results
Results table Important to obtain results accurately as the
subjects won’t be able to do it again! If stuff ups- rotate to next athlete
Analysis
Graph blood lactate 3 measures 4 athletes
Why lactate elevated at post test? Anaerobic energy Lactate production exceeds removal Accumulate in blood
Continue to elevate- Gender differences- amt muscle, fitness levels
increased buffering capacity in males
Discussion
Overview what was done What was found?
Calculations
Decide- will they do this at home? Or will you have a station with an expert (you)? Will assistants calculate for each athlete?
Peak anaerobic power Relative Peak power Total Work Anaerobic fatigue
Questions
1- Explain what they are and what we found- use own language
2- Anaerobic capacity the right term? 3- Causes anaerobic fatigue 4- Removal of lactate
Conclusion