Reliability of heart rate responses to non-steady-state activities of daily living in men with spinal cord injuries
Janssen TW, van Oers CA, van der Woude LH, Hollander AP.
Faculty of Human Movement Sciences, Vrije University, Amsterdam, The Netherlands.
The reliability of heart rate responses to non-steady-state tasks among 37 men with spinal cord injuries (lesion level: C4/5-L5) was examined with a simple heart rate recording device (Sport Tester PE3000). Three identical trials of 6 different transfers and an 8-cm curb ascent were performed on one day (Trial 1 and 2; n = 37) and one week later (Trial 3; n = 12). Pearson's r and intraclass correlations for the highest and the mean heart rate provoked during Trial 1 and 2 ranged from 0.73 to 0.97 for the transfers and from 0.92 to 0.97 for the curb ascent. Correlations were somewhat lower for Trial 1 versus Trial 3. A paired t-test revealed lower heart rate responses to Trial 2 and 3, suggesting a moderate learning effect and/or a reduction in psychological stress. It was concluded that heart rate responses to non-steady-state tasks, as recorded by a Sport Tester PE3000, are reproducible in men with spinal cord injuries.
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