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

Information Explain 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