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VALIDATION OF AN EXERCISE INTENSITY GRADING TOOL TO CATEGORISE THE EXERCISE INTENSITY OF COMMUNITYBASED PHYSICAL ACTIVITY PROGRAMS

By: Grant Turner

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Introduction: We assessed the validity and reliability of an exercise intensity grading tool (Exercise Grading Tool (EGT)) designed to grade the exercise intensity of community-based physical activity classes as one currently doesn’t exist. 

Methods: Twelve classes participated in the study. Class providers completed the EGT twice for each class over two weeks. Class participants rated their exercise intensity using the Borg Rating of Perceived Exertion Scale (RPE) at class completion. A session-RPE (sRPE) score was calculated by multiplying RPE by the class time. The average session percentage heart rate reserve (%HRR) was also collected from five participants in each class wearing rs400 polar heart rate monitors. Spearman’s Rank correlation coefficients were used to assess validity, and interclass correlation coefficients for reliability. 

Results: Significant positive moderate relationships were found between the EGT and %HRR, sRPE and RPE.