Likewise, strong positive relationships between the IES and wall squat duration (r = 0.849), HR (r = 0.819) and BP (r = 0.841) were seen. A strong positive linear relationship was found between the IES and the CR-10 (r = 0.967).
Throughout the exercise protocol, RPE (IES and Borg’s CR-10), heart rate and blood pressure were recorded.
The tests were continuous with no rest periods between the stages. Workload was determined by knee joint angle from 135° to 95°. Each test consisted of five 2-min stages of progressively increasing workload. Twenty-nine male participants completed four incremental isometric wall squat tests. Therefore, the aim of this study was to assess the validity of a specific Isometric Exercise Scale (IES) during a continuous incremental IE test. However, ratings of perceived exertion (RPE) may provide a more accessible means of monitoring exercise intensity. Current methods of prescribing and controlling isometric exercise intensity often require the use of expensive equipment and specialist knowledge. Isometric exercise (IE) interventions are an effective non-medical method of reducing arterial blood pressure (BP).