preparatory lecture anaerobic energy systems. today general comments and instructions information ...

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