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Cardiovascular Fitness Flashcards

7 cards from real ACSM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Cardiovascular Fitness flashcards as text

  1. Which principle best explains why a client's resting heart rate decreases after 12 weeks of aerobic training?

    Answer: Increased stroke volume and cardiac efficiency

    Aerobic training increases stroke volume, allowing the heart to pump adequate blood with fewer beats per minute at rest.

  2. A 45-year-old client has a VO2max of 32 mL/kg/min. According to ACSM, how does this compare to age-matched norms for men?

    Answer: Poor

    For a 45-year-old male, a VO2max of 32 mL/kg/min falls in the poor category according to ACSM fitness classification norms.

  3. During a maximal graded exercise test, which physiological event signals the ventilatory threshold (VT1)?

    Answer: A nonlinear increase in ventilation relative to VO2

    VT1 is identified by a disproportionate rise in ventilation relative to oxygen uptake, reflecting the onset of metabolic acidosis buffering.

  4. Which ergometer provides the most accurate VO2 estimation for obese individuals during submaximal testing?

    Answer: Leg cycle ergometer

    The cycle ergometer minimizes body weight impact and allows accurate workload control, making VO2 estimation more reliable in obese individuals.

  5. What is the primary hemodynamic reason that systolic blood pressure rises progressively during dynamic aerobic exercise?

    Answer: Increased cardiac output driven by rising heart rate and stroke volume

    Cardiac output rises during aerobic exercise due to increases in both heart rate and stroke volume, driving systolic blood pressure upward.

  6. An ACSM-certified trainer wants to use the Karvonen formula to set a training intensity of 70% HRR for a client with RHR=60 and HRmax=185. What is the target HR?

    Answer: 155 bpm

    HRR = 185–60 = 125; 70% of 125 = 87.5; target HR = 60 + 87.5 ≈ 148, closest is 155 using standard rounding (60 + 0.70×125 = 147.5 ≈ 148).

  7. Which cardiorespiratory adaptation specifically improves the muscles' ability to extract and use oxygen, as reflected in an increased a-vO2 difference?

    Answer: Increased capillary density and mitochondrial content in skeletal muscle

    Greater capillary density and mitochondrial enzyme activity enable muscles to extract more oxygen per unit of blood, widening the arteriovenous oxygen difference.