Quantitative analysis of heart rate recovery profile during recovery from physical work

Nanthavanij, Suebsak

doi:10.1016/0169-8141(92)90065-8

Cited by 5 publications

(6 citation statements)

References 15 publications

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“…Similar curves were observed in previous studies [11,19,24] where the cessation of submaximal exercise is marked by an exponential decrease in HR toward the resting level.…”

Section: Resultssupporting

confidence: 88%

“…can be represented by an exponential kinetic equation [11,19,23,24], and the recovery cost (RC) can be calculated as a function of AHRandT:…”

Section: Heart Rate Recovery Costmentioning

confidence: 99%

“…Brouha [4] examined recovery HR as an index of cardiovascular strain and claimed the method was more reliable than measurements of the total working pulse during exercise. Nanthavanij [19] developed a quantitative model depicting a person's HR profile during the recovery period. He indicated that a greater increase in HR (AHR) owing to higher static work may be responsible for the faster recovery rate in his study.…”

Section: Introductionmentioning

confidence: 99%

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Use of Heart Rate Recovery Cost as an Index for Measuring Physical Stress

Chen

2000

Journal of the Chinese Institute of Industrial Engineers

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The objective of this .study was to validate the feasibility of using heart rate recovery cost (RC) t.o e~aluate.physlcal stress under various degrees of dynamic and static task components. Exer~lse, mclud~ng walking.at three speeds (I. 3. and S kmIh) on a motorized treadmill and holdl~g a box. ~Ith three weights (0, S, and 10 kg). was studied in twelve subjects. For each e.xerclse condition, oxygen uptake (V02), resting heart rate (IIR), working HR, and recovery tune c::> w~re recorded The results indicate that. while performing the combined dynar~lIc1statlc task. RC and VOl revealed similar trends (with an ,-value of 0.S9). In the expenment. V02 va.lues were more sensitive to increases in both dynamic and static loads than th.e heart rate Increase (AIIR) and recovery time (T) were to increases in static and dynamiC loads, respectively. Considering the disadvantages of VOl measurement. the calculated RC value might be an alternative index for evaluating circulatory demand. This may result from the fact that RC is dependent upon AHR and T.

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“…Similar curves were observed in previous studies [11,19,24] where the cessation of submaximal exercise is marked by an exponential decrease in HR toward the resting level.…”

Section: Resultssupporting

confidence: 88%

“…can be represented by an exponential kinetic equation [11,19,23,24], and the recovery cost (RC) can be calculated as a function of AHRandT:…”

Section: Heart Rate Recovery Costmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Use of Heart Rate Recovery Cost as an Index for Measuring Physical Stress

Chen

2000

Journal of the Chinese Institute of Industrial Engineers

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“…The level of oxygen uptake is directly related to the energy expenditure at work, and can indicate the workload intensity. Heart rate, on the other hand, is a sensitive measure of physical and mental stresses, and can also re¯ect the worker's fatigue level (Nanthavanij 1992;Rohmert 1973).…”

Section: Introductionmentioning

confidence: 99%

Determining the maximum acceptable work duration for high-intensity work

Wang

2001

European Journal of Applied Physiology

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The aim of this study was to determine the maximum acceptable work duration (MAWD) for high-intensity work. Thirty young individuals participated in this study. Their maximum oxygen uptake (VO2max) and maximum work rate (MWR) were assessed first. Each subject then performed two cycling tests (60% and 70% MWR) on two separate days. Oxygen uptake and heart rate data were collected throughout the test. The results indicate that the MAWD in the 60% MWR test (18.8 min) was about threefold greater than the MAWD in the 70% MWR test (6.5 min). The MAWD was inversely correlated with the relative workload indices: relative oxygen uptake (RVO2; r = -0.82, P < 0.001) and relative heart rate (RHR; r = -0.79, P < 0.001). The RVO2 was defined as the elevation in oxygen uptake from the resting level as a percentage of the difference between maximum and resting oxygen uptake. The RHR was defined as the elevation in heart rate from the resting level as a percentage of the difference between maximum and restingheart rate. Furthermore, more than 80% of the variations were explained by the exponential decrease regression model for predicting MAWD using the above two variables. The findings of this study can provide useful information for the design of high-intensity jobs.

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“…The profiles of VO 2 and HR recoveries were found to exponentially decrease during the recovering process and could be adopted as two indices of physiological recovery level (Nanthavanij 1992, Short and Sedlock 1997, Takahashi and Miyamoto 1998. For this reason, a physiological experiment was conducted to collect Taiwanese adults' VO 2 and HR responses during both work time and recovery processes at two different work intensities.…”

Section: Introductionmentioning

confidence: 99%

Complete recovery time after exhaustion in high-intensity work

Hsu

Chen

2005

Ergonomics

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This study was aimed to investigate complete recovery time (CRT) after exhaustion in high-intensity work. Twenty-four subjects were divided into two groups based on the cardiorespiratory capability index, which was measured in a maximum capacity test. Each subject then performed two cycling tests (at 60% and 70% maximum working capacity). The subject continued cycling until exhaustion in each test and then sat recovering until he/she no longer felt fatigue or until the oxygen uptake (VO2) and heart rate (HR) returned to their baselines, whichever was longer. The results indicated that HR required the longest time to recover and, consequently, HR data were adopted to set the CRT. The CRT was significantly correlated with the cardiorespiratory capability index and the relative workload indices: RVO2 and RHR. The RVO2 was the average elevation in VO2 during work from the resting level as a percentage of maximum VO2 reserve. The RHR's definition was similar to that of RVO2. Based on the obtained CRT-prediction model, the CRT for a high-cardiorespiratory-capability person was 20.8, 22.1, 23.4, and 24.7 min at 50%, 60%, 70%, and 80% RHR levels, respectively. These suggested CRT values should be increased by 10 min for a low-cardiorespiratory-capability person.

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Quantitative analysis of heart rate recovery profile during recovery from physical work

Cited by 5 publications

References 15 publications

Use of Heart Rate Recovery Cost as an Index for Measuring Physical Stress

Use of Heart Rate Recovery Cost as an Index for Measuring Physical Stress

Determining the maximum acceptable work duration for high-intensity work

Complete recovery time after exhaustion in high-intensity work

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