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Book Validation of the Cosmed Fitmate for Predicting Maximal Oxygen Consumption

Download or read book Validation of the Cosmed Fitmate for Predicting Maximal Oxygen Consumption written by Jung Min Lee and published by . This book was released on 2008 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary purpose of this study was to assess the validity of the Cosmed Fitmate (FM) in predicting maximal oxygen consumption (VO2[subscript max]), compared to the Douglas bag (DB) method. In addition, this study examined whether measuring submaximal VO2, rather than predicting it, can improve upon the prediction of VO2[subscript max]. Thirty-two males and sixteen females (Mean " SD: age 31 " 10 yr, body mass 72.9 " 13.0 kg, height 1.75 " 0.09 m, BMI 23.4 " 3 kg·m−2) volunteered to participate in the study. Each participant completed a submaximal and a maximal treadmill test using the Bruce protocol on two separate occasions. During the submaximal test, VO2[subscript max] was predicted using the FM, while during the maximal test VO2[subscript max] was measured using the DB method. The Cosmed Fitmate predicts VO2[subscript max] by extrapolating the linear regression relating heart rate and measured VO2 to age-predicted maximum heart rate (HR = 220-age). This study also examined the validity of predicting VO2[subscript max] by using the ACSM metabolic equations to estimate submaximal VO2. VO2[subscript max] values from the FM, the DB method, and ACSM prediction equations were analyzed using repeated measures ANOVA and linear regression analyses. The level of significance was set at P

Book A Comparison of Maximal Oxygen Consumption Values as Determined by Predicted and Actual Techniques

Download or read book A Comparison of Maximal Oxygen Consumption Values as Determined by Predicted and Actual Techniques written by Robert Gerald Glassford and published by . This book was released on 1964 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study was designed to permit a comparison of the values obtained on four maximal oxygen consumption tests: the Mitchell, Sproule and Chapman Maximal Oxygen Intake Test, the Taylor, Puskirk and Penschel Treadmill test of Maximal Oxygen Consumption, the modified Astrand Bicycle Ergometer test of Maximal Oxygen Uptake and the modified Astrand-Ryhming Nomogram for the Prediction of Maximal Oxygen Uptake. In addition, an attempt was made to determine the degree of relationship between the predictive-type maximal oxygen consumption test, the determined measures of maximal oxygen consumption as yielded by both of the treadmill tests and the bicycle ergometer test and a test of physical fitness. The Johnson, Brouha and Darling test of Physical Fitness was used to determine a fitness score. A second aspect of the study was an attempt to examine changes in oxygen uptake values on the various tests incurred by additional work after a maximal value had been arrived at on the basis of the criteria established in the test outline. The experimental group was composed of 24 healthy, physically active male students and staff members of the University of Alberta and soldiers from Griesbach Barracks, Edmonton, Alberta. The age range was 17 to 53 years. The testing sequence was based on a permutation design except for the physical fitness test which was administered on the initial visit. A Godart Capnograph carbon dioxide analyzer and a Beckman #E-2 oxygen analyzer were used for the gas analysis and their accuracy was validated by the Scholander method. The mean maximal oxygen consumption values obtained on the Mitchell et al. test, Taylor et al. test and the modified Astrand-Ryhming Nomogram test were found to be significantly larger than the mean obtained on the modified Astrand Bicycle Ergometer test (p = .05). The values (expressed as liters of oxygen consumed per minute) obtained on the modified Astrand-Ryhming nomogram correlated at 0.80 with the physical fitness test, 0.78 with the Mitchell et al. test, 0.72 with the Taylor, Buskirk and Henschel test and 0.65 with the modified Astrand Bicycle Ergometer test. Correlations after body weight was partialled out were of the same magnitude. Of 22 subjects who performed extra worklevels on the Mitchell et al. test after achieving a criterion-designated maximal oxygen uptake, 15 developed a significantly higher value (p = .01). Seven subjects participated in this phase of the study on the Taylor et al. test. Three of the seven developed a significantly higher maximal oxygen consumption value (p = .05). None of the 15 subjects who did extra work on the modified Astrand Bicycle Ergometer test was able to elicit a higher maximal oxygen uptake value. Within the limitations of the study it was concluded that: 1. The treadmill tests and the predictive-type test yielded higher maximal oxygen consumption values than did the modified Astrand Bicycle Ergometer test. 2. The correlation coefficients which resulted from a comparison of the Astrand-Ryhming Nomogram test with the other four tests were not significantly different from the correlations that existed between the maximal tests of oxygen consumption and the fitness score. 5. The Astrand-Ryhming test produced a significantly larger variance than did any of the three direct tests of maximal oxygen consumption. 4. The present criteria used for the establishment of a maximal oxygen consumption value on the two treadmill tests studied do not necessarily provide a maximal estimation of this ability for all subjects.

Book Re examination of the Astrand Rhyming Nomogram to Predict VO2 Max Using a Stepwide Multiple Regression Technique

Download or read book Re examination of the Astrand Rhyming Nomogram to Predict VO2 Max Using a Stepwide Multiple Regression Technique written by Ellen Therese O'Connor and published by . This book was released on 1987 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Prediction of Maximal Oxygen Uptake from a Perceptually regulated Exercise Test PRET

Download or read book The Prediction of Maximal Oxygen Uptake from a Perceptually regulated Exercise Test PRET written by Mike Morris and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Borg 6-20 rating of perceived exertion (RPE) scale is a common measure reported during exercise testing and training, and is usually taken as a response measurement to provide a subjective assessment of exercise intensity. A lesser used application of the scale is for regulating exercise intensity, referred to as its 'production mode'. Recent research on this topic initiated by Eston et al. (2005) has led to a novel application of this procedure as a means of predicting an individual's maximal oxygen uptake ( O2max) via a perceptually-regulated exercise test (PRET). The PRET could play a significant role in guiding exercise prescription and monitoring cardiorespiratory fitness levels in situations where the normal heart rate response is affected. The aim of this thesis is to develop further and test the integrity of the PRET technique. Firstly, a review of the evidence on the validity and reliability of the Borg RPE scale when used to regulate exercise intensity in healthy and unhealthy adults is presented, as to-date, no scholarly publication has synthesised the body of knowledge on this specific application of the scale. Subsequently, four studies were completed to investigate the effects of different methodological variations on the predictive capabilities of the PRET, including an examination (for the first time) of its utility among heart failure patients (Study 4). Study 1 re-visited the validity and reliability of the PRET technique utilising a modified protocol of differing durations (2 and 4 min bouts), with revised instructions and placing the graded exercise test (GXT) as the final trial during cycle ergometry. Superior results were observed to those reported in previous investigations (Eston et al., 2008; Faulkner et al. 2007; Eston et al., 2006) during the 3 min trial, further reinforcing the validity and reliability of this technique. Accordingly, Study 2 was the first to investigate the reliability and validity of a treadmill PRET protocol with a ceiling intensity of RPE 15, rather than RPE 17, and observed that a safer modified PRET (with practice) provides acceptably valid and reliable predictions of O2max in healthy adults. In addition, Study 3 extended the research thus far by investigating the PRET protocol during cycle exercise, once again with a ceiling intensity of RPE 15, and demonstrated that (with practice) a cycle-based PRET can yield reliable and valid predictions of O2max that compare favourably to previous investigations. Finally, given that the research employing a PRET has unanimously alluded to its likely value in clinical populations among whom heart rate as a physiological response to exercise is affected (e.g. via medication) and precluded as a means predicting O2max, Study 4 investigated the utility of a PRET in a beta-blocked population of heart failure patients. In the event, it was observed that a PRET (up to RPE 15) was too strenuous and needs to be capped at an intensity of RPE 13 in this population. In addition a continuous protocol seemed unsuitable due to its length and it was recommended that a discontinuous PRET protocol be investigated. Future research needs to investigate the utilisation of the PRET (i) in different exercise modes; (ii) determine the optimum number of practice trials required; (iii) whether a discontinuous or continuous protocol is more appropariate; (iv) whether the extrapolation should be made to RPE 19 or 20 and; (v) whether the PRET can be employed succesfully in other clinical populations.

Book Prediction of Maximal Oxygen Consumption in Healthy Adults

Download or read book Prediction of Maximal Oxygen Consumption in Healthy Adults written by Annette Hyde and published by . This book was released on 2004 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book An Evaluation of the Modified Astrand Ryhming Nomogram as an Estimator of Maximal Oxygen Consumption

Download or read book An Evaluation of the Modified Astrand Ryhming Nomogram as an Estimator of Maximal Oxygen Consumption written by Gerald H. Baycroft and published by . This book was released on 1964 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forty-eight physically active males were used to evaluate the modified Astrand-Ryhming Nomogram as a predictor of Maximal oxygen consumption. In addition to the modified Astrand Bicycle Ergometer test of Maximal Oxygen Uptake and the Mitchell, Sproule and Chapman Maximal Oxygen Intake test, body height, weight and surface area as well as fitness scores and time run on the Johnson, Brouha and Darling test of Physical Fitness were studied. Oxygen uptake tests were performed in definite sequences and subjects were equally divided by chance into all possible orders. Gas analyses were performed using a Beckman E-2 oxygen analyser and a Godart Capnograph carbon dioxide analyser and checked by the Scholander method. Results were analysed with Pearson Product-moment correlation coefficients and analysis of variance. Results obtained were: In terms of liters per minute, the modified Astrand-Ryhming nomogram produced significant correlations (p = .01) of O .67 with the Mitchell, et al test, and 0.62 with the modified Astrand Bicycle test. The treadmill test correlated 0.51 with the maximal bicycle test. With body weight partialled out the correlations were again significant (p = .01) and equal to 0.53> 0.47» and 0.39 respectively. Fitness scores on the Johnson, Brouha and Darling test produced significant correlations (p = .01) of O .38 with the treadmill test, O .46 with the maximal bicycle test, and 0.55 with the predicted test in terms of liters per minute. Corresponding values in milliliters per kilogram of body weight per minute were 0 . 46 , 0.55» and O .67 respectively. Height correlated significantly with the Astrand Bicycle test (p = .01), the Mitchell, et al test (p = .05) and the predictive test (p = .05) in terms of liters per minute. Weight and body surface area produced equivalent results which were significant with all three of the oxygen consumption tests in terms of liters per minute (p = .01) and with the two actual tests (negative relationship) in terms of milliliters per kilogram of body weight per minute (p * .05). Fitness scores and endurance measured on the Johnson, et al test did not correlate significantly with height, weight, or body surface area. Within the limits of this study, the following conclusions have been made: 1. For the population studied, the Mitchell, Sproule and Chapman Maximal Oxygen Intake test and the modified Astrand-Ryhming Nomogram for Prediction of Maximal Oxygen Uptake, yielded significantly higher mean values than the modified Astrand Bicycle Ergometer test of Maximal Oxygen Uptake. 2. Statistically equivalent means were obtained on the modified Astrand- Ryhming Nomogram and the Mitchell, Sproule and Chapman Maximal Oxygen Intake test. 5. The Astrand-Ryhming Nomogram produced a significantly greater variance than did the modified Astrand Bicycle Ergometer test and the Mitchell, Sproule and Chapman test. 4. The Astrand-Ryhming Nomogram was able to predict maximal oxygen intake values on the modified Astrand Bicycle Ergometer test and the Mitchell, Sproule and Chapman test as well as the latter tests were able to predict values on each other. 5. As measured by the Johnson, Brouha and Darling test of Physical Fitness, the Astrand-Ryhming Nomogram was able to predict physical fitness as well as the modified Astrand Bicycle Ergometer test and significantly better than the Mitchell, Sproule and Chapman test. 6. Body weight and surface area produced equivalent significant correlations with the three test of maximal oxygen uptake in terms of liters of oxygen consumed per minute. 7. Body height, weight and surface area did not show any significant relationships with the Johnson, Brouha and Darling fitness index or endurance. 8 . Correlation coefficients involving body weight and body surface area proved to be virtually identical.

Book DEVELOPMENT AND VALIDATION OF A REGRESSION MODEL TO ESTIMATE VO2 Max FOR OLDER ADOLESCENTS FROM PACER 20 M SHUTTLE RUN PERFORMANCE

Download or read book DEVELOPMENT AND VALIDATION OF A REGRESSION MODEL TO ESTIMATE VO2 Max FOR OLDER ADOLESCENTS FROM PACER 20 M SHUTTLE RUN PERFORMANCE written by Matthew S Hanna and published by . This book was released on 2017 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: The PACER provides a convenient and relatively low cost assessment of aerobic fitness. The PACER is less expensive and more readily available than stationary or portable metabolic systems, can be completed in a condensed area of 20 meters, and can be administered to large groups. The PACER is the preferred (or default) test of aerobic fitness for the FITNESSGRAM[registered] youth fitness program. The purpose of this study was to develop a regression model to estimate VO2 max from PACER performance, age, gender, and body mass or body mass index in 17- to 18-year-old males and females. Additionally, several previously published equations were cross-validated to allow for comparison between prediction models. A secondary purpose was to examine the criterion-referenced validity of the models. Participants included 22 females and 26 males aged 17 to 18 years. Height and weight were assessed and percent body fat was measured with air displacement plethesmography via the BOD POD. Participants completed a maximal treadmill test following the Bruce protocol. The PACER 20-m multi-stage shuttle run was completed following FITNESSGRAM[registered] procedures. Multiple linear regression analysis was used to predict VO2 max from the number of laps completed on the PACER, age, gender, and body mass or body mass index. Estimates of VO2 max from previously published prediction models were cross-validated and the standard error of estimate (SEE) and total error (TE) were calculated. Comparison of the two error estimates identified the effect of systematic overestimation or underestimation on prediction accuracy. Mean scores for VO2 max for males (41.9 ± 9.9) and females (33.1 ± 6.7) were lower than the 2010 FITNESSGRAM[registered] Healthy Fitness Zone (HFZ) standards (males [greater-than or equal to] 44.2 ml.kg-1.min-1 and females [greater-than or equal to] 38.6 ml.kg-1.min-1). Only 27% of female participants (n = 6) and 42% of male participants (n = 11) had a measured VO2 in the HFZ. The only variable that significantly contributed to estimation of VO2 max was PACER laps completed. The model developed on the current sample was: VO2 max = 20.41012 + (PACER laps * 0.41304). The correlation between measured VO2 max and VO2 max predicted from this equation was high (R = .89). All cross-validated prediction equations produced high correlations between measured and estimated VO2 max (R [greater-than or equal to] .81). The prediction model developed in the current study and the L©♭ger et al. (1988) model produced the highest correlations (r = .89) between measured and estimated VO2 max, the lowest standard errors of estimate (4.36 ml.kg-1.min-1 and 4.43 ml.kg-1.min-1), and the lowest TE (4.36 ml.kg-1.min-1 and 4.81 ml.kg-1.min-1). Criterion-referenced analysis was used to examine the classification accuracy of the models for three categories (HFZ, Needs Improvement – Some Risk [NISR], and Needs Improvement – High Risk [NIHR]) and two categories (HFZ and Needs Improvement [NI]). Proportion of agreement for the three category analysis was moderate (Pa = .73) for the model developed in the current study. When classification was condensed into two classification zones (HFZ and NI), Pa increased (Pa = .88). The remaining cross-validated models had a low to moderate Pa (.52 - .66) under the three category format, and moderate Pa (.66 - .77) under the two category format. In conclusion, the prediction model developed in the current study developed on an older adolescent sample provides an accurate estimate of VO2 max. The variable of laps completed on the PACER was the only significant contributor to the equation. Most of the previously published equations were notably less accurate than this new model. The current prediction model also produced accurate classification of fitness levels into the Healthy Fitness Zone or Needs Improvement categories.

Book Reliability and Validity of Maximal Oxygen Uptake Prediction from a Submaximal Exercise Test on the Powersport Evolution Cycle Ergometer

Download or read book Reliability and Validity of Maximal Oxygen Uptake Prediction from a Submaximal Exercise Test on the Powersport Evolution Cycle Ergometer written by Eifion T. Roberts and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Prediction of Maximal Oxygen Uptake Using the Rockport One Mile Walk Test and Rating of Perceived Exertion

Download or read book Prediction of Maximal Oxygen Uptake Using the Rockport One Mile Walk Test and Rating of Perceived Exertion written by Alexander L. Beauchene and published by . This book was released on 2015 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was designed to evaluate the effect of using the Rating of Perceived Exertion (RPE) on the accuracy of the Rockport 1- mile walk test. Eighty-eight subjects ranging in age and fitness levels performed a Rockpmt 1- mile walk test and a Balke maximal oxygen consumption (V02max) test on the treadmill. During both tests the subject's RPE was recorded each stage of the V02mnx test and every 200 meters of the Rockpmt test. Maximal oxygen consumption was predicted by using linear regression. The accuracy of the equations was determined using multiple regression (R2 between V02max predicted fi·om 1 mile walk time and RPE with measured V02max· The Rockport lJ equation was slightly less accurate compared to the original Rockport, but is simpler as it only used 2 variables. The equation: Predicted V02max = 31.142- (1.13- (Walk time))- (.305(final RPE)) x 3.5, R2 predictive power to the equation when compared to only using time to walk !·mile and was not significantly different than the original Rockport equation. ) and standard error of estimate (SEE).

Book The Prediction of Maximal Oxygen Uptake from a Perceptually regulated Exercise Test PRET

Download or read book The Prediction of Maximal Oxygen Uptake from a Perceptually regulated Exercise Test PRET written by Michael Martin Morris and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: