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Predicting oxygen uptake during counterclockwise arm crank ergometry in men with lower limb disabilities
1Rehabilitation Research & Development Center, Edward Hines, Jr. Veterans Affairs Hospital, Hines, IL 60141, USA.
Archives of Physical Medicine and Rehabilitation
|July 1, 1995
Summary
A new equation accurately predicts oxygen uptake during counterclockwise arm crank ergometry (ACE) for men with lower limb disabilities. This EXP equation shows less prediction error than previous models for clockwise ACE.
Area of Science:
- Exercise Physiology
- Rehabilitation Science
Background:
- Predicting oxygen uptake (VO2) is crucial for exercise prescription in individuals with lower limb disabilities.
- Existing equations for arm crank ergometry (ACE) may not accurately reflect physiological responses during counterclockwise movements.
Purpose of the Study:
- Develop and validate a novel equation for predicting VO2 during counterclockwise ACE in men with lower limb disabilities.
- Compare the predictive accuracy of the new equation against established equations for clockwise ACE.
Main Methods:
- Recruited 55 men with spinal cord injuries or lower limb fractures.
- Utilized maximal ACE-graded exercise tests to record metabolic responses.
- Employed stepwise regression to derive and validate the prediction equation.
Main Results:
- The derived EXP equation (VO2 = 127.06 + 7.201*Watts + 4.502*weight + 0.033*Watts^2) explained 89.8% of VO2 variance in the prediction group.
- The equation demonstrated similar predictive accuracy in the validation group (SEE = 144.0 mL/min).
- Prediction error was lower compared to equations for clockwise ACE.
Conclusions:
- The developed EXP equation provides a more accurate prediction of VO2 during counterclockwise ACE for this population.
- The level of injury did not significantly impact the equation's accuracy.
- Counterclockwise ACE appears to be metabolically more economical than clockwise ACE in men with paraplegia.