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RPE angle effects in young and middle-aged adults.

D M Pincivero1, M K Timmons, D Elsing

  • 1Wilfrid Laurier University, Kinesiology & Physical Education, Waterloo, Canada. dpincivero@wlu.ca

International Journal of Sports Medicine
|February 12, 2010
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Summary
This summary is machine-generated.

Perceived exertion during arm abduction is higher at 90 degrees, regardless of age. Middle-aged adults show a non-linear relationship between contraction intensity and perceived exertion at lower arm angles.

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Area of Science:

  • Exercise Physiology
  • Biomechanics
  • Aging Research

Background:

  • Understanding how age and movement mechanics influence perceived exertion is crucial for exercise prescription and injury prevention.
  • Previous research has explored factors affecting muscle fatigue and perceived effort, but age-related differences in arm abduction require further investigation.

Purpose of the Study:

  • To investigate the effects of contraction intensity and arm abduction angle on perceived exertion in healthy young and middle-aged adults.
  • To compare perceived exertion responses between these two age groups under varying mechanical conditions.

Main Methods:

  • Participants performed maximal voluntary contractions (MVC) and sub-maximal contractions (10-90% MVC) at 30, 60, and 90 degrees of arm abduction.
  • Perceived exertion was measured using the modified Borg category-ratio scale after each sub-maximal contraction.
  • Voluntary arm abduction torque and perceived exertion data were analyzed for significant differences and modeled using power functions.

Main Results:

  • Arm abduction torque was greatest at 30 degrees compared to 60 and 90 degrees, with no age-related differences.
  • Perceived exertion was significantly higher at 90 degrees of abduction compared to 30 and 60 degrees, irrespective of age group.
  • Power function modeling indicated non-linear perceived exertion trends in middle-aged adults across all angles and in young adults at 90 degrees.

Conclusions:

  • Elevated arm positions increase perceived exertion during abduction tasks.
  • Middle-aged adults exhibit a unique non-linear relationship between contraction intensity and perceived exertion at lower arm elevation angles.
  • These findings highlight the importance of considering arm angle and age in assessing perceived exertion during upper limb activities.