OBLA – Onset of Blood Lactate concentration shows and an increase equal to 4.0mM
Trained Athlete Question 1 Put an X on the point of Lactic threshold. Question 2 What would the red line (blood lactate) look like for an untrained athlete? Question 3 Place a ▲ on the OBLA for both trained and untrained people
Changes in Heart Rate How much blood the heart is pumping out per minute. So…. Which heart before/after training is working harder? ________________________________________ Why? _____________________________________________________ __________________________________________________________
Systolic Blood Pressure Pressure on the arteries following contraction of ventricles as blood is pumped out of the heart Diastolic Blood Pressure Pressure in the arteries when the heart relaxes and ventricles fill with blood
a-V0 2 difference = Arteriovenous oxygen difference: “difference in oxygen consumption when comparing that in the arterioles to the venules, and an indirect measure of how much oxygen muscles are using”
An ↑in a-V0 2 difference results in
More blood being pumped to active muscles (especially slow-twitch)
Muscle fibres better at extracting and processing oxygen as a result of ↑’ed mitochondria numbers, more oxidative enzymes and ↑’ed levels of myoglobin.
All of this is due to the oxygen demands of the muscles
What is the main difference between fast and slow twitch fibres?
Muscle hypertrophy occurs in response to both aerobic and anaerobic training. Briefly discuss what this means and how it brings about improved performance levels under each situation.
How do mitochondria bring about improved aerobic performances?
As a result of aerobic training, muscles ‘learn’ to make earlier and greater use of fats as a fuel (especially under sub-maximal exercise conditions). Explain how this leads to improved endurance performances.