COMPARISON OF PERCEIVED EXERTION DURING EXERCISE AND PHYSICAL ACTIVITY IN PATIENTS WITH CONGESTIVE HEART FAILURE
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Exertion
Perceived exertion
The relation between perceived exertion and physiological indicators of exertion during exercise was studied. HR (heart rate) Vo2, (oxygen uptake) and blood lactate concentration were measured, and RPE (rating of perceived exertion) waa recorded at different work loads for 12 subjects working with a wheelbarrow, with lifting of weights, and on a bicycle ergometer. The results showed that RPE is related to HR in a fairly linear way irrespective of the kind of work. Differences in the level of perceived exertion in relation to heart rate were found between the different kinds of work. These differences were related, to some extent, to the amount of oxygen uptake and blood lactate concentration.
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Perceived exertion
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Perceived exertion
Exertion
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The problem investigated was to compare the effects of orders of presentation and anchors on the ratings of perceived exertion obtained during bicycle ergometry. Based on the statistical analysis of the data, the following findings were apparent: 1. It was found that there were no significant differences in mean scores of perceived exertion obtained among the orders of presentation, ascending, descending, and random. 2. It was found that the light anchor mean score was significantly greater than those of the heavy or identical anchor. 3. It was found that there were significant differences among the ratings of perceived exertion that may be attributed to changes in work loads. 4. It was found that there were significant differences among the mean scores of ratings of perceived exertion that may be attributed to the interaction of the main effects. As a result of the findings, the following conclusions were deemed appropriate within the limitations of the study: 1. Ratings of perceived exertion in ascending and random order increased proportionately in value as the work load increases. 2. Contrast effects are present in ratings of perceived exertion obtained during bicycle ergometry. 3. The majority of previous findings agree with the present research with respect to anchors and orders of presentation. 4. Light anchors and ascending orders of presentation make work appear to be more strenuous than what it actually is. 5. Heavy anchors and descending orders of presentation make work appear to be less strenuous than what it actually is.
Perceived exertion
Exertion
Presentation (obstetrics)
Affect
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Abstract This paper describes a study carried out among 44 employees who use breathing apparatus in the form of compressed air masks during their work. The purpose of the study was to determine the extra load caused by working with compressed air masks during the performance of (simulated) tasks. The average exertion level demanded by the four tasks varies from 30% to 93% of the maximum load during cycle ergometry. The data relating to the extra load are obtained by recording heart rate using the Sporttester PE 3000 and by measuring oxygen uptake using a modified Oxylog apparatus. The duration of the tasks is also recorded. The study results show that at a low level of exertion when working with compressed air equipment, the extra load gives no special cause for concern. At high exertion levels, the subjects adapt to the increase in the external load by taking more time to perform the task. This increase in the external load has the additional effect of reducing the available reserve capacity (cardiovascular and energetic). When rescuing a victim, this could mean that the operation takes longer when compressed air mask equipment is used;it is then in the interests of both the victim and the rescue worker with breathing apparatus that the latter has an excellent physical work capacity.
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Exertion
Compressed air
Breathing gas
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Obesity is an increasing problem across the globe that has been strongly associated with work-related injury. One-handed carrying is considered one of the most fatiguing methods of load carrying. The objective of this study was to examine the effects of obesity and load magnitude on heart rate and ratings of perceived exertion among young adult males during one-handed carrying. Load magnitude was observed to have a statistically significantly effect on heart rate and perceived exertion of the arm, back and whole body, whereas obesity was significant only for perceived exertion of the arm. The results suggest that young adult obese males can carry similar loads as young adult non-obese males without having a statistically significant increase in heart rate or perceived exertion. However, more research is needed to validate these results for longer distances and carrying times.
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A prolonged bicycle ergometer task at a fixed sub-maximal intensity was carried out under three experimental conditions, varying in terms of the amount of feedback about performance provided to subjects. Using a repeated-measures methodology, subjects were asked every 3 min. to rate their perceived exertion and to estimate their expected performance level. The data indicated that these two measures were highly correlated when no feedback was given. However, when feedback about performance was given, the expected performance level was accordingly adjusted whereas the measure of perceived exertion remained unchanged. These data were interpreted as indicating that perceived exertion was based on physiological processes whereas the measure of expected performance was largely based on a cognitive-anticipatory process. The temporal course of relationships between the level of perceived exertion and heart rate indicated that, whereas the two measures were initially related, this relationship disappeared after heart rate had reached its steady state level. These data suggest that physiological processes other than heart rate have become the source of exertion perceptions.
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Exertion
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Exertion
Perceived exertion
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The present study investigates the efficiency of babywearing in terms of perceived exertion while walking. The sample consists of young adults who have no experience in babywearing. The participants (N = 20), aged between 20-35 years old (M=24.85, SD=2.13) were exposed to three conditions: babywearing without any carrier, babywearing with a soft-structured carrier, and babywearing with a wrap. The perceived exertion was analysed after the participants walked on a treadmill for 1.6 km while carrying a 5-kg and 60-cm doll in the mentioned conditions. The perceived exertion was measured using the RPE Borg CR10 scale and Bodymap. The statistical results show that the independent variable had significant effect on the rating of perceived exertion (p < 0.05). The participants who used the soft-structured carrier and wrap reported lower perceived exertion compared to those who did not wear any carrier, especially in axial muscles such as levator scapulae, deltoids, and upper trapezius. This implies that babywearing using a wrap and soft-structured carrier is more comfortable and able to exert less pain to the muscles.
Perceived exertion
Exertion
Treadmill
Musculoskeletal pain
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Perceived exertion
Exertion
Bicycle ergometer
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Abstract. Perceived exertion was measured using a linear grading scale, in three healthy males performing paired patterns of continuous and intermittent exercise with the same average power output. Intermittent exercise with work periods of 10 sec. alternating with recovery periods of loadless pedalling for 30 sec. was associated with lower perceived exertion grades than when work periods were 30 or 120 sec. Perceived exertion, oxygen intake, ventilation, heart rate, and blood lactate concentration were all significantly higher for intermittent exercise than for continuous exercise with the same average power output. The relationships between perceived exertion and the physiological variables was the same for the two forms of exercise despite widely different mechanical stresses on the legs. Mechanical factors were therefore thought to make a relatively unimportant contribution to perceived exertion over the range of exercise intensities studied.—The high degree of correlation between perceived exertion and the measured physiological variables suggests a wider use of exertion grading in field studies.
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Exertion
Grading (engineering)
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