CCSP Exercise Physiology & Sports Performance Testing 2 — Questions and Answers
Question 1: During progressive dynamic aerobic exercise, which blood pressure pattern is most characteristic?
- Both systolic and diastolic pressure rise proportionally throughout exercise
- Systolic pressure rises while diastolic pressure remains stable or decreases slightly (Correct answer)
- Diastolic pressure rises significantly while systolic pressure plateaus
- Both systolic and diastolic pressures decrease as exercise becomes more intense
Correct answer: Systolic pressure rises while diastolic pressure remains stable or decreases slightly
During dynamic aerobic exercise, increased cardiac output raises systolic BP while peripheral vasodilation in working muscles keeps diastolic BP stable or slightly reduced.
Question 2: Compared to untrained individuals, endurance-trained athletes achieve higher maximal cardiac output primarily due to:
- A higher maximum attainable heart rate during exercise
- Increased peripheral vascular resistance during intense exercise
- Reduced oxygen extraction capacity in working muscles
- Greater stroke volume from cardiac hypertrophy and enhanced ventricular filling (Correct answer)
Correct answer: Greater stroke volume from cardiac hypertrophy and enhanced ventricular filling
Endurance training causes eccentric cardiac hypertrophy that increases end-diastolic volume and stroke volume, driving higher maximal cardiac output without requiring a higher maximum heart rate.
Question 3: Exercise-induced bronchospasm (EIB) is most commonly triggered by:
- Elevated arterial PCO2 during maximal aerobic effort
- Reduced tidal volume during steady-state exercise
- Inhalation of cold, dry air during high-intensity exercise (Correct answer)
- Decreased respiratory rate at the anaerobic threshold
Correct answer: Inhalation of cold, dry air during high-intensity exercise
Cold, dry air inhaled during intense exercise dries and cools airway mucosa, triggering mast cell mediator release and bronchoconstriction characteristic of EIB.
Question 4: In a healthy trained athlete exercising at sea level, arterial oxygen saturation (SpO2) during maximal effort would most likely:
- Drop below 85% due to increased oxygen extraction by muscles
- Fall to 70–80% due to inadequate pulmonary diffusion capacity
- Rise above 99% due to hyperventilation-driven respiratory alkalosis
- Remain above 95% as pulmonary function is rarely the limiting factor (Correct answer)
Correct answer: Remain above 95% as pulmonary function is rarely the limiting factor
Healthy athletes at sea level maintain SpO2 above 95% during maximal exercise because pulmonary diffusion capacity and ventilation are adequate to meet oxygen transport demands.
Question 5: The primary mechanism by which aerobic endurance training improves VO2 max is:
- Increasing the maximum heart rate achievable during exercise
- Reducing arterial oxygen content through training-induced hemodilution
- Increasing stroke volume and therefore maximal cardiac output (Correct answer)
- Decreasing the oxygen extraction capacity of skeletal muscle
Correct answer: Increasing stroke volume and therefore maximal cardiac output
Aerobic training raises stroke volume through cardiac eccentric hypertrophy and plasma volume expansion, increasing maximal cardiac output and oxygen delivery to muscles.
Question 6: During maximal exercise, which mechanism most significantly enhances oxygen release from hemoglobin to working muscles?
- Increased arterial pH causing respiratory alkalosis
- Decreased muscle temperature in active tissues
- Rightward shift of the oxyhemoglobin dissociation curve due to acidosis and increased temperature (Correct answer)
- Reduced 2,3-DPG levels in red blood cells during intense effort
Correct answer: Rightward shift of the oxyhemoglobin dissociation curve due to acidosis and increased temperature
The Bohr effect causes a rightward shift of the oxyhemoglobin dissociation curve in response to acidosis, elevated CO2, and increased temperature, facilitating O2 unloading at working muscle.
Question 7: A drop in systolic blood pressure during graded exercise testing is clinically significant because it most often indicates:
- Normal physiological vasodilation in working skeletal muscle
- Deconditioning and reduced baseline cardiovascular fitness
- Exercise-induced bronchospasm reducing cardiac preload
- Left ventricular dysfunction or significant myocardial ischemia (Correct answer)
Correct answer: Left ventricular dysfunction or significant myocardial ischemia
A failure of systolic BP to rise, or its decline during progressive exercise, is a serious indicator of impaired left ventricular function or significant myocardial ischemia and is a criterion for test termination.
CCSP Exercise Physiology & Sports Performance Testing 2
During progressive dynamic aerobic exercise, which blood pressure pattern is most characteristic?