3/3 ex phs

Upcoming Exams

• Austrian Rhyming Test

  • A stationary cyclergometer test

  • Used for estimating VO2 max

• Spring Break

  • No tests or activities planned

• First Lab Exam

  • Scheduled for the Wednesday after spring break

  • Will cover content from all labs

  • Equation sheet provided early for study purposes

Exam Format

• The test format includes true/false questions

  • Clear that each answer must be evaluated individually (true or false)

  • No combined answers (e.g. A and B, C and D)

  • Expect to identify relationships based on lab content

• Questions may require calculations derived from lab scores

• Emphasis on reviewing materials to be prepared

Metabolism Basics

• Focus on ATP Generation

  • Important adaptations developed through exercise training

  • Increased efficiency in ATP production leads to improved performance (running farther and faster)

• Review of aerobic and anaerobic ATP contributions for various activities as outlined in the textbook (p. 41)

  • Marathon running predominantly utilizes aerobic ATP production (almost 100% aerobic)

  • Resistance training heavily relies on anaerobic ATP production

Exercise Prescription Considerations

• Understanding the metabolic characteristics of various exercises is essential for prescribing effective training programs

  • Example: Football players require short bursts of energy, hence a need for explosive anaerobic capacity.

  • Importance of designing programs that match the energy expenditure demands of the activity

ATP Production Systems

• Initial Stage of Activity

  • ATP production starts with the ATP-PC system, which utilizes ATP bound to myosin heads.

  • Followed by anaerobic glycolysis and then aerobic metabolism which is slower to activate

Power and Capacity of ATP Production

• Definitions:

  • Power: Amount of ATP produced per unit of time.

  • Capacity: Total ATP produced without considering time

• Energy Systems: Relative Power and Capacity

  • ATP-PC system: High power, low capacity (for short bursts)

  • Anaerobic glycolysis: Moderate power, greater capacity than phosphagen system

  • Aerobic metabolism: Highest capacity, slow power production

  • Fatty acid oxidation: Greatest capacity but slowest power generation

Energy Sources and Substrates

• Normal healthy individuals have an inexhaustible supply of fat for energy

• Relationship between power and capacity is inversely proportional: The higher the power, the lower the capacity and vice versa.

Role of Enzymes in ATP Production

• Enzymatic reactions are essential to all ATP production pathways

• Historical Reference: Edward Buchner's research in the 1800s discovered conversion of glucose to alcohol in yeast without the traditional belief in "vital spirits."

• Highlighted the biochemical processes essential for energy production.