01c. Acute Responses - muscular Flashcards
List 6 acute muscular responses
Increased AV02 Diff, temperature, production of byproducts, motor unit recruitment, increased firing rate, Depletion of fuels.
What happens to AVO2 diff in response to exercise and why?
What = increases
Why = increased oxygen taken into and used by muscles
What happens to fuels as an acute response to exercise?
they decrease
Explain what happens to temperature as an acute response
Because heat is a by product of aerobic respiration (resynthesising ATP using oxygen) then temperature increases as a result of increased intensity
Describe what happens to the production of Metabolic By-products when you exercise
The anaerobic glycolysis system produces Lactic acid which breaks down into lactate and Hydrogen Ions (H+ Ions). The H+ Ions cause fatigue (does not allow the muscle to contract properly).
Describe motor unit recruitment
A motor unit is a muscle fibre and the motor neuron which attaches to it (it passes messages from the brain to the muscle).
The more motor units recruited the more force you produce.
Describe firing rate of a motor unit
The speed of the message being sent to the motor unit
The faster the firing rate, the faster the contraction of muscle contrac
What acute response increases the amount of force produced?
Motor unit recruitment
What acute response increases the speed of force production?
Firing rate of motor unit
What causes increased H+ ion production?
Increased Anaerobic glycolysis contribution
