DETERMINATION OF MAXIMAL OXYGEN CONSUMPTION (VO2MAX) LAB REPORT
Texas Woman’s University
In this lab, we explored the theory of maximal oxygen consumption. “Maximal oxygen uptake (VO2max) is defined as the highest rate at which oxygen can be taken up and utilized by the body during severe exercise” (Bassett and Howley, 2000). VO2max is measured in millimeters of O2 consumed per kilogram of body weight per min (ml/kg/min). It is commonly known as a good way to determine a subject’s cardio-respiratory endurance and aerobic fitness level. Two people whom are given the same aerobic task (can both be considered “fit”) however, the more fit individual can consume more oxygen to produce enough energy to sustain higher, intense work loads during exercise. The purpose of this lab experiment was performed to determine the VO2max results of a trained vs. an untrained participant to see who was more fit.
Methods & Materials
This lab experiment was conducted in a Texas Woman’s University exercise physiology lab room, on September 20, 2013. It consisted of two main participants: A trained participant (Male; 30 years old; 72 in. tall; 82.9 kg) and an untrained participant (Female; 20 years old; 65 in. tall; 75 kg). They were selected by my Prof. April Hartman to participate because they were best qualified to conduct the study in our class. Both participants were assigned to carry out the same experimental task. The Bruce Protocol (graded test) on a treadmill (mode of exercise) was used to conduct the VO2max test. The materials needed were: 1 metabolic cart (with computers); 2 mouthpieces; 1 nose clip; 1 treadmill; 1 RPE scale; 1 timer; pen; paper; and a HR monitor.
1) The metabolic cart was calibrated before beginning gas collection.
2) Participant’s information as well as environmental information (relative humidity, temperature, and barometric pressure) was entered into the computer software.
3) Exercise testing procedures were fully explained to the participants before beginning the experiment.
4) The participant was well fitted with a HR monitor during exercise.
5) The participant was fitted with a nose clip and mouthpiece (which had a tube air way connection) before beginning gas measurement which connected to the computer to save the data.
6) Pre-exercise measurements of resting heart rate and lactate was measured and recorded as they rested for 3 min. “During each test, the subject was verbally encouraged to continue exercise until exhaustion” (Kang, 2001).
7) The exercise intensity was to be increased every 3 min. until the participant reached maximal effort and could no longer continue.
8) During each stage of exercise the values of VO2, VE, RER, HR, RPE, and LA concentration were monitored and recorded prior, during, and after the protocol for both participants.
9) After reaching maximal effort, the participant entered the recovery mode and continued...