![Sample our Behavioral Sciences journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/110801/TOC-Subject-Sample-2021-Behavioral-Sciences.jpg"})
Abstract
The objective of the present study was to develop a simplified heart rate recovery cost (RC) model and to validate it under various degrees of dynamic and static task components. The simplified model of heart rate recovery cost consisted of two parameters: heart rate increase (DeltaHR) and recovery time (T). The following formula revealed their relationship: RC (recovery cost) = T (DeltaHR-1)/lnDeltaHR Exercise, including cycling at three work loads (40, 60, 80 W) on a cycle ergometer, and carrying a backpack with three weights (0, 7.5, 15 kg) was studied in seven male subjects. For each exercise condition, resting HR, working HR, and recovery time (T) were recorded. The results support the hypothesis that neither heart rate increase nor recovery cost could completely assess the physical stress incurred when performing a combined dynamic/static exercise. The DeltaHR measurement was more sensitive to the increase of static load and the calculated RC value increased with both dynamic and static load. The simplified model of recovery cost can be easily applied without interfering with a person's work routine and without discomfort.
