Effectiveness of myocardial oxygen consumption as a measure of physical and mental workload

Lara Abril Chiu Vegamontes, University of Texas at El Paso

Abstract

The objective of this experimental study was to determine if the use of myocardial oxygen consumption was a better measure than oxygen consumption. Relationships between heart rate, age, blood pressure and rates of perceived exertion were established for 40 Mexican American young adults. The independent variables in the proposed study were; the measured volumetric oxygen consumption (expressed in percentage of its maximal value), the myocardial oxygen consumption (expressed in percentage of its maximal value) and the rate of perceived exertion (determined by Borg's Scale RPE score). The treadmill was used as a mean to perform sub-maximal exercise testing on three levels of workload (to stress participants physically). The mental arithmetic technique was utilized at two levels of workload (to stress participants mentally). ^ The specific research objectives were: (1) To determine how sensitive myocardial oxygen consumption was in comparison with oxygen consumption to tasks involving mental, physical, mental and physical workloads at different levels of difficulty and what portion of their maximal values these represent. (2) To test the relationships between oxygen consumption, myocardial oxygen consumption, heart rate, age predicted rate product pressure, maximal heart rate, systolic blood pressure and rate of perceived exertion. ^

Subject Area

Biology, Animal Physiology|Psychology, Physiological

Recommended Citation

Chiu Vegamontes, Lara Abril, "Effectiveness of myocardial oxygen consumption as a measure of physical and mental workload" (2004). ETD Collection for University of Texas, El Paso. AAIEP10534.
http://digitalcommons.utep.edu/dissertations/AAIEP10534

Share

COinS