(Blank)
VO2 refers to
•refers to the amount of oxygen the body takes in, transports and uses in one minute.
Oxygen deficit
is defined as when O2 supply is less than O2 demand.
EPOC stands for
EPOC - Excessive Post-exercise Oxygen Consumption
2 Acute Physiological Responses to Exercise - Cardiovascular
↑ Heart Rate
↑ Stroke Volume
↑ Cardiac Output
↑ Systolic Blood Pressure
↑ a ─ VO2 difference
↑ Venous Return
Redistribution blood flow
↓ Plasma Volume
What cardiovascular measure plateaus at submaximal intensity
Stroke Volume
VO2 max refers to
•refers to the maximum amount of oxygen the body takes in, transports and uses in one minute.
Steady state
occurs when oxygen supply is equal to oxygen demand.
EPOC Fast Replenishment Recovery Time:
3–5 minutes
Heart Rate
is the number of times that an individual’s heart beats per minute.
Ventilation is
the total amount of air inhaled and exhaled per minute.
at rest the body uses ....... litres oxygen per minute.
0.25 / 0.3
EPOC
is defined as being when O2 supply is greater than O2 demand post exercise.
Why is there redistrabution of blood flow when exercising
This results in the working muscles receiving a higher percentage of the body’s blood than they would during rest.
Stroke Volume
is the amount of blood pumped from the left ventricle of the heart per beat. (systole contraction)
Tidal Volume is
is the amount of air inhaled in and out in one breath.
VO2 Max can be measured in absolute or relative terms. Explain the difference
•Absolute VO2 max does not include the athlete’s body weight (kg). Measured as L/min
•Relative VO2 max includes the athlete’s body weight (kg). Measured as mL/kg/min
Where does pulmonary diffusion take place
Capillaries - Alveoli
Respiratory Rate refers to
the number of breaths taken per minute
Cardiac output
- amount of blood ejected from the left ventricle per minute.
Ventilation is the product of
respiratory rate and tidal volume.
It is possible for someone to work above their VO2 max. Explain how
A person can work at intensities above their VO2 max. For this to occur, some of their energy must be supplied anaerobically from either the ATP-CP system or the anerobic glycolysis energy system. Therefore, they can be working at their VO2max in terms of taking in maximum oxygen but can also receive additional energy from their anaerobic systems which do not require oxygen to produce energy
Size principle states that
the recruitment of motor units starts with smaller motor units and progresses to larger motor units.
a-vO2 difference is
is the difference in the concentration of oxygen in the arterioles (which transport blood to the muscle) compared to the venules (which transport blood away from the muscle).
Cardiac output is the product of
heart rate and stroke volume.
Difference between diostolic and systolic blood pressure
Systolic Blood Pressure is the pressure in the arteries after the blood has been pumped out of the heart.
Diastolic Blood Pressure is the pressure in the arteries when the heart fills again with blood (therefore it is lower).