Influence of limb length on a stepping exercise

Shahnawaz, H.

doi:10.1152/jappl.1978.44.3.346

Cited by 19 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because of a concern that leg length relative to bench height may affect performance during step tests (Shahnawaz, ), we considered including leg length in all within‐population regressions. Leg length was calculated by subtracting participant seated height (minus chair height) from standing height.…”

Section: Methodsmentioning

confidence: 99%

Patterns of senescence in human cardiovascular fitness: VO₂max in subsistence and industrialized populations

Pisor

Gurven

Blackwell

et al. 2013

American J Hum Biol

View full text Add to dashboard Cite

Objectives This study explores whether cardiovascular fitness levels and senescent decline are similar in the Tsimane of Bolivia and Canadians, as well as other subsistence and industrialized populations. Among Tsimane, we examine whether morbidity predicts lower levels and faster decline of cardiovascular fitness, or whether their lifestyle (e.g., high physical activity) promotes high levels and slow decline. Alternatively, high activity levels and morbidity might counterbalance such that Tsimane fitness levels and decline are similar to those in industrialized populations. Methods Maximal oxygen uptake (VO2max) was estimated using a step test heart rate method for 701 participants. We compared these estimates to the Canadian Health Measures Survey and previous studies in industrialized and subsistence populations. We evaluated whether health indicators and proxies for market integration were associated with VO2max levels and rate of decline for the Tsimane. Results The Tsimane have significantly higher levels of VO2max and slower rates of decline than Canadians; initial evidence suggests differences in VO2max levels between other subsistence and industrialized populations. Low hemoglobin predicts low VO2max for Tsimane women while helminth infection predicts high VO2max for Tsimane men, though results might be specific to the VO2max scaling parameter used. No variables tested interact with age to moderate decline. Conclusions The Tsimane demonstrate higher levels of cardiovascular fitness than industrialized populations, but levels similar to other subsistence populations. The high VO2max of Tsimane is consistent with their high physical activity and few indicators of cardiovascular disease, measured in previous studies.

show abstract

Section: Methodsmentioning

confidence: 99%

Patterns of senescence in human cardiovascular fitness: VO₂max in subsistence and industrialized populations

Pisor

Gurven

Blackwell

et al. 2013

American J Hum Biol

View full text Add to dashboard Cite

show abstract

“…Some research suggests that a participant's leg length is a factor in predicting VO 2 max from the step test because step height influences biomechanical efficiency and heart rate (Ashley, Smith & Reneau, 1997;Shahnawaz, 1978;). reported that the high bench height of the Harvard Step Test may impose a disadvantage for those individuals with shorter leg lengths.…”

Section: Leg Length and The Step Testmentioning

confidence: 99%

“…reported that the high bench height of the Harvard Step Test may impose a disadvantage for those individuals with shorter leg lengths. Shahnawaz (1978) measured O 2 consumption on ten subjects while they preformed the step test on several different bench heights. The lowest O 2 consumption was found when the bench height was 50 percent of the leg length, and a significant relationship between leg length and O 2 consumption during the step test existed.…”

Section: Leg Length and The Step Testmentioning

confidence: 99%

Estimating VO₂max Using a Personalized Step Test

Webb

Vehrs

George

et al. 2014

Measurement in Physical Education and Exercise Science

View full text Add to dashboard Cite

The purpose of this study was to develop a personalized step test and a valid regression model that used non-exercise data and data collected during the step test to estimate VO 2 max in males and females 18 to 30 years of age. All participants (N= 80) successfully completed a step test with the starting step rate and step height being determined by the self-reported perceived functional ability (PFA) score and participant's height, respectively. All participants completed a maximal graded exercise test (GXT) to measure VO 2 max. Multiple linear regression analysis yielded the following equation (R = 0.90, SEE = 3.43 mL≅kg-1 ≅min-1): 45.938 + 9.253(G)-0.140(KG) + 0.670(PFA) + 0.429(FSR)-0.149(45sRHR) to predict VO 2 max (mL≅kg-1 ≅min-1) where: G is gender (0=female;1=male), KG is body mass in kg, PFA is the sum of the two PFA questions, FSR is the final step rate (step-ups/min), and 45sRHR is the recovery heart rate 45 seconds following the conclusion of the step test. Each independent variable was significant (p < 0.05) in predicting VO 2 max and the resulting regression equation accounted for roughly 83% (R 2 =0.8281) of the shared variance of measured VO 2 max. Based on the standardized β-weights, gender (0.606) explained the largest proportion of variance in VO 2 max values followed by PFA (0.315), body mass (-0.256), FSR (-0.248), and the 45sRHR (-0.238). The cross validation statistics (R PRESS = 0.88, SEE PRESS = 3.57 mL≅kg-1 ≅min-1) show minimal shrinkage in the accuracy of the regression model. This study presents a relatively accurate model to predict VO 2 max from a submaximal step test that is convenient, easy to administer, and individualized.

show abstract

“…The PFI obtained in this study was calculated with the equation from the Harvard Step Test (Brouha 1943). [2,4,[12][13][14][15][16][17][18][19][20]. in this test The researcher used the same standard of Harvard step test with modifying the height of the step according to the knee joint angle as follows: the height of the step should start with 35cm and up to be correlated with the knee joint angle when and only when it's 90º sharp as it will guarantee that all participants are performing the test without any overload according to the height of all participants and to concern the individual differences when the test is performed aiming to raise its validity and reliability.…”

Section: Step Test Protocolmentioning

confidence: 99%

“…Body weight has also been shown to be a factor. Testing large groups with this test will be time consuming [3,[12][13][14][15][16][17][18][19][20]. A lot of those studies proved the impact of the leg length, the step height and the angle of knee joint on vo2max result via Harvard step test for example , ( Ryhming I.…”

Section: Introductionmentioning

confidence: 99%

Effect of a Resistance Training Program on GH, IGF-1, Lactate and Digital Level in Female Swimmers

2011

Journal of Applied Sports Science

View full text Add to dashboard Cite

The purpose of this study was to evaluate and compare the validity and reliability of Harvard step test (HST) to predict the maximum oxygen uptake (Vo2max) through different methods, the first method via traditional Harvard step test (THST) with step height 50.8 cm, the second method by Multi-Height step according to the knee joint angle (KJAHST), where the researcher detects to Criterion-Related Validity between the two methods and the laboratory test via treadmill gas analysis system according to the established protocol (ZAN 600 device) , and in order to achieve the best method to predict (Vo2max) correct values through the Harvard step test in healthy college students, Participants (N = 120) age 20.06 ± 0.56 years, height 171.79 ± 5.83 cm, weight 70.39 ± 6.39 kg, the values of vo2max were calculated with the previous methods, the results showed that the value of correlation coefficient between (THST) and laboratory test was r = 0.818, while the value of correlation coefficient through (KJAHST) and the laboratory test was r = 0.905, which indicates that the two methods are valid to predict vo2max correct values, but the researcher recommended the usage of (KJAHST) method because it is more valid and accurate than (THST) , also there weren't any significant differences between testing and re-testing for the second method (KJAHST) and the value of correlation coefficient was r = 0.913, so the researcher built Z-scores levels using the second method to be the standard in evaluating (Vo2max).

show abstract

Influence of limb length on a stepping exercise

Cited by 19 publications

References 0 publications

Patterns of senescence in human cardiovascular fitness: VO₂max in subsistence and industrialized populations

Patterns of senescence in human cardiovascular fitness: VO₂max in subsistence and industrialized populations

Estimating VO₂max Using a Personalized Step Test

Effect of a Resistance Training Program on GH, IGF-1, Lactate and Digital Level in Female Swimmers

Contact Info

Product

Resources

About

Influence of limb length on a stepping exercise

Cited by 19 publications

References 0 publications

Patterns of senescence in human cardiovascular fitness: VO2max in subsistence and industrialized populations

Patterns of senescence in human cardiovascular fitness: VO2max in subsistence and industrialized populations

Estimating VO2max Using a Personalized Step Test

Effect of a Resistance Training Program on GH, IGF-1, Lactate and Digital Level in Female Swimmers

Contact Info

Product

Resources

About

Patterns of senescence in human cardiovascular fitness: VO₂max in subsistence and industrialized populations

Patterns of senescence in human cardiovascular fitness: VO₂max in subsistence and industrialized populations

Estimating VO₂max Using a Personalized Step Test