Pe Gcse Flashcards
Stroke volume
Amount of blood pumped out of the heart per beat
Heart rate
Beats per minute
Cardiac output
Volume of blood pumped out of the heart per minute
Equation for cardiac output (Q)
cardiac output = stroke volume * heart rate
Short terms of exercise cardiovascular system:
Stroke volume, heart rate, cardiac output
What results in an increase in SV, HR, and Q
Means more blood is being provided to the working muscles , reducing the build up of lactic acid.
Sporting example of STA of cardiovascular
Marathon runner - heart rate increase, SR inc and cardiac output increase
Short term affects of respiratory:
Breathing rate, tidal volume
Breathing rate
Number of breaths per minute
Tidal volume
Amount of air inhaled or exhaled per breath
Sporting example of STA respiratory
Powerlifter - 1 rep max , breathing rate increases and tidal volume increases
what results in inc of breathing rate and tidal volume
More oxygen is being inhaled. This is because the exercise is anaerobic meaning so the inhaled oxygen helps prevent build up of lactic acid
Short term affects muscular
Muscle fatigue , lactate accumulation
Muscle fatigue
Reduction in a muscle’s ability to produce force
Lactate accumulation
Process of lactic acid accumulation in blood and muscle due to inc work intensity
Sporting example of muscular STA
Football player will feel sore and tired after an intense game
Results in accumulation of lactic acid and fatigue
Negative affect as it restricts player from playing at optimal level
Vasoconstriction
Lumen gets smaller as less blood is needed to the non working muscles
Vasodilation
Lumen widens as more blood is needed for the working muscles
