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F2009_Lect3 - Results from last week’s lab Results See...

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Unformatted text preview: Results from last week’s lab Results See handout for data from two See hypothetical subjects for RMR hypothetical You must answer all lab report questions You for both subjects both Lab report #2 will be due next week in Lab class BY FRIDAY 5PM class I have not finished grading lab report #1 have yet. Those will be handed back next week yet. If you are having issues with writing the If lab reports, please email me sooner rather than later than Submaximal Exercise Testing Testing Aerobic Power and VO2max Aerobic Aerobic Power Indicative of the body’s ability to utilize oxygen for the Indicative performance of work performance Association of low aerobic power and increased Association coronary heart disease risk factors coronary ► Maximal Oxygen Uptake (VO2max) Maximal •Most often used indicator of aerobic power •Maximal amount of oxygen your body can utilize •The greater the VO2max, the more aerobically fit Methods to Assess VO2max Methods Field Tests for Cardiorespiratory Fitness Submaximal Laboratory Tests Lab #3 – Next Week Lab #4 Maximal Laboratory Tests Field Tests Field Benefits Relatively cheap and easy to perform Can test large groups Appropriate for individuals of a wide fitness and age Appropriate range range Not as accurate Timed 1.0 and 1.5 mile runs Rockport Walk Test Negatives Examples Examples of Submaximal Laboratory Tests Laboratory Also estimate VO2max Benefits Easy to administer No expensive equipment Treadmill submax lab tests YMCA 3-min step test YMCA Bike Test Astrand Cycling Test Walking/Running/Stepping Cycling Tests • Both based on HR response The use of laboratory submaximal exercise tests to estimate VO2max exercise Submaximal exercise tests are able to Submaximal estimate VO2max due to the following assumptions: assumptions: A llinear relationship exists between HR, VO2, inear and exercise intensity and That the maximum HR at a given age is That uniform (220-age) uniform That the mechanical efficiency (VO2 at a That given workload) is the same for everybody given Are these assumptions accurate? Are No, and can result in an error in estimating No, VO2max of 10 to 20% VO2max Extrapolations of HR at submax workloads Extrapolations to estimated max HR level to average O2 consumption can result in error consumption *How is VO2 max expressed?* *How Absolute VO2 The actual amount of oxygen your body utilizes Usually in L O2/min or mL O2/min The amount of oxygen your body uses per kilogram of The bodyweight bodyweight mL O2/kg/min Allows comparison between people of different sizes Relative VO2 Vo2 max = 3 l/min 45 kg 66.7 ml/kg/min Vo2 max = 5 l/min 135 kg 37.0 ml/kg/min *How to convert from absolute to relative (and vice versa)* to Absolute to relative (L O2/min « mL Absolute O2/kg/min) O2/kg/min) If absolute is in L O2/min • Multiply L O2/min by 1000 to get mL O2/min • Divide mL O2/min by body weight in kg Relative to absolute (mL O2/kg/min « L Relative O2/min) O2/min) Multiply mL O2/kg/min by bodyweight in kg to get mL Multiply O2/min O2/min If you want absolute as L O2/min: • Divide mL O2/min value by 1000 Athlete Bjorn Daehlie Miguel Indurain John Ngugi Dave Bedford Steve Prefontaine Lance Armstrong Joan Benoit Bill Rodgers Sebastian Coe Grete Waitz Frank Shorter Derek Clayton Event Cross country skier Cyclist (winner of Tour de France) 5 times world cross country champ Former 10km World Record holder 1 mile (3:54.6) Cyclist (winner of Tour de France) Marathon (AR 2:21:21 1985) Marathon (AR 2:09:27 1979) 1 mile (WR 3:48.95 1979) Marathon (WR 2:25:29 1983) Marathon (Olympic Gold 1972) Marathon (WR 2:09:36 1967) VO2 Max 90.0 88.0 85.0 85.0 84.4 84.0 78.6 78.5 77.0 73.0 71.0 69.7 VO2 Max Reference Values VO2 Next Week Next Three submax tests Treadmill test Astrand-Rhyming cycling test YMCA cycling test HR HR Work Rate Equation for YMCA Equation VO2max (mL/min) = 1.8 ml/kgm X WRmax VO2max (kg/min) + (7 ml/kg/min X body wt kg) (kg/min) Treadmill SubMax Data Treadmill *Female, Wt = 72 kg, 20 years old Stage 1 2 3 4 VO2 (l/ min) 1.545 2.053 2.258 2.685 RER 0.77 0.89 0.95 0.99 HR 169 174 183 186 RPE 7 10 14 16 HR VO2 Next week Next Lab #3: Submaximal testing Treadmill, Astrand-Rhyming, YMCA Cycling Quiz on methods for Lab #3 at the Quiz beginning of class beginning Lab report #2 will be due – NEXT FRIDAY I will hand back lab report #1 Please see me or email me if you have Please any questions or concerns ...
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