Kin 470 lab 3 notesVideo 1:Fick equationVo2 = Q * AVDO2Q = SV * HR (delivery)AVDO2 = Arterial O2 – Venous O2 (uptake)X axis = % voxY axis = cardiac outputIncreases to 100%Kink in graph Q = SV * HRPlateau at 40% VO2 max – stroke volumeIncrease in contractility – heart expands, contracts stronger, increase in volume-increase in amount pushed out per beat-only goes to 40% because contractility maxed outheart rate increases to 100% of VO2 max – linear relationshipat max stroke volume and contractility – increase the number of times the heart contractHR = bpmSV = ml/beatMl/minutes = cardiac outputAVDO2 – difference in oxygen in arteries and veinsOxygen rich in arteries capillaries tissues oxygen depleted blood in veins heartIncreases linearly, slope declines at about 50%Kink is because at higher VO2’s, the oxygen and hemoglobin are going so quick, it doesn’t get dropped off (less efficient)Components combined – VO2 vs. workrateLinear relationship until VO2 maxMeasuring VO2 maxPrediction equation:Long equation, variables: body weight kg, height - meters, age years, gender (male = 1, female = 0), physical activity scoreLarge populationTime efficientYounger people tend to have higher, males have higher, height – bigger thoracic cavity, body weight is subtracted (negative factor)VO2 max = ml/kg/minSubmaximal exercise prediction testUses a submaximal exercise bout to predict what happens at maxExample: YMCA bike testHR has linear relationship to VO2Points on graph based on HR – predict max VO2Maximal exercise testO2 consumption during a maximal exercise boutCriteria for successful test:A plateau or decrease in VO2 despite further increases in workload. Best predictor for attaining a true VO2 maxRER > 1.1 using anaerobic systems than we would expect for aerobic, lots of carbs being usedExercise HR is within 15 bpm of age predicted max HR (220-age)Blood lactate concentrationInvasive > 70-80/100 mgMethods – long lab reportRight methods section for paperTake notes during labProcedure: 8-12 minutes per subject1. perform prediction equation2. 2. Perform VO2 max testa. responsibilitiesi. resistance setter1. increase resistance according to protocolii. time keeper – 1 min, 2 mins, etciii. HR recorder/shadow1. Shadow – push them to the end, keep eye on person, make sure they work hard but don’t have a bad reaction/feel sickiv. Medcart reporter1. Stand in front of medcart, record numbers they see every minutes2. Data not given, need to record it3. Write Vo2, co2, and RERv. Data recorder will write them down1. Dependent on these two people working togethervi. RPE director1. Sign that shows borg scale, physical exertion scale, asks how hard they think they are working2. 1-203. subject can’t talk – thumbs up or downvii. cheering squad – whoever doesn’t have a task1. need to keep them going2. will be cool to see what their numbers areb. videos - set up is the same3. assignmenta. introi. what do I need to know to understand what we didii. what are we looking at?iii. Physicological ideas behind itiv. What are we looking for?b. Methodsi. Paragraph formii. Detailed methodsiii. Give enough detail that it could be repeatedc. results, calculations, discussiond. graphs, etce. end of handout on spark are the questions for discussion
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