VO2 max Flashcards
Q: What are the direct protocols for VO2max testing?
Direct protocols for VO2max testing typically include continuous, incremental exercise tests performed on treadmills, cycle ergometers, or other ergometers, where intensity is gradually increased until volitional fatigue or until the subject can no longer maintain the required intensity.
What are the components measured in VO2max testing?
VO2 (oxygen consumption), VCO2 (carbon dioxide production), and RER (respiratory exchange ratio).
What are the BASES valid test criteria for VO2max testing?
Reaching a plateau in VO2 despite an increase in workload, RER > 1.10, a blood lactate concentration of > 8 mmol/L, and reaching within 10 beats per minute of the subject’s age-predicted maximum heart rate.
What are submaximal tests for estimating VO2max?
Submaximal tests for VO2max include the Åstrand-Rhyming (A-R) cycle ergometer test, the ACSM submaximal cycle ergometer test, the Chester Step Test, and the Rockport One Mile Walk Test.
What is the Åstrand-Rhyming (A-R) test?
A submaximal cycle ergometer test where the subject pedals at a constant workload for 6 minutes, and heart rate is measured to estimate VO2max based on a nomogram or equations.
What is the ACSM submaximal cycle ergometer test?
A submaximal test involving multiple stages of increasing intensity, where heart rate is recorded at the end of each stage, and the data is used to extrapolate to VO2max using ACSM guidelines.
What is the Chester Step Test?
A submaximal step test where the subject steps up and down on a step at increasing rates, with heart rate monitored at each stage. VO2max is estimated from the heart rate responses to the step rates.
What is the Rockport One Mile Walk Test?
A submaximal test where the subject walks one mile as quickly as possible on a flat surface, with heart rate measured immediately after. VO2max is estimated using the time to complete the walk, heart rate, age, and weight.
What are the units of measure for VO2max?
Absolute VO2max is measured in liters per minute (L/min) or milliliters per minute (mL/min), and relative VO2max is measured in milliliters per kilogram of body weight per minute (mL/kg/min).
What is the normative data for VO2max for various populations?
Normative VO2max values vary by age, sex, and fitness level. For example, young adult males typically have VO2max values ranging from 35-55 mL/kg/min, while young adult females typically range from 30-50 mL/kg/min.
Why is VO2max important in clinical populations?
VO2max is a key indicator of cardiovascular and overall health, helping to assess the risk of chronic diseases, guide exercise prescriptions, monitor rehabilitation progress, and evaluate the effectiveness of interventions.
What conditions can affect VO2max?
VO2max can be affected by age, sex, genetics, training status, altitude, chronic diseases (e.g., heart disease, pulmonary disease, diabetes), and lifestyle factors such as smoking and diet.
What are some examples of direct protocols for VO2max testing?
Common direct protocols include the Bruce treadmill test, the Balke treadmill test, the Astrand cycle ergometer test, and the modified Costill/Fox protocol, all involving graded exercise to exhaustion while measuring respiratory gases.
What roles do VO2 and VCO2 play in VO2max testing?
VO2 represents the volume of oxygen consumed per minute, while VCO2 represents the volume of carbon dioxide produced per minute. Together, they help determine the efficiency of oxygen use and energy production during exercise.
What is the significance of the Respiratory Exchange Ratio (RER) in VO2max testing?
RER is the ratio of VCO2 to VO2. An RER > 1.10 indicates a high-intensity effort, approaching maximal exertion, and is one criterion for achieving VO2max during testing.
