Optimization of Temperature and Relative Humidity with Maximum Oxygen Uptake (VO2max) and Heart Rate (HR) by Using Response Surface Methodology (RSM)

2021 ◽  
pp. 723-734
Author(s):  
Ahmad Rasdan Ismail ◽  
Norfadzilah Jusoh ◽  
Nor Kamilah Makhtar ◽  
Raemy Md Zein ◽  
Muhamad Mat Noor ◽  
...  
Keyword(s):  
Heart Rate ◽  
Response Surface Methodology ◽  
Relative Humidity ◽  
Oxygen Uptake ◽  
Response Surface ◽  
Maximum Oxygen Uptake

Optimization of Aflatoxin Production of Aspergillus flavus on Peanuts

2014 ◽  
Vol 887-888 ◽  
pp. 605-609
Author(s):  
Chu Shu Zhang ◽  
Jie Sun ◽  
Li Na Yu ◽  
Jie Bi ◽  
Jian Xiong Feng ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Relative Humidity ◽  
Linear Relationship ◽  
Water Content ◽  
Response Surface ◽  
Aspergillus Flavus ◽  
Previous Experiment ◽  
Aflatoxin Production ◽  
Influence Of Water ◽  
Production Conditions

To optimize aflatoxin production of Aspergillus flavus on peanut, the response surface methodology were applied based on previous experiment. The results showed that the influence of water content of peanuts,time and relative humidity were obvious and were not linear relationship. The optimal aflatoxin production conditions were that water content of peanuts was12%, the time was 7 days, relative humidity was 80%.

MEDICAL EFFECT OF SPORTS ON IMPROVING THE MAXIMUM OXYGEN

2021 ◽  
Vol 27 (7) ◽  
pp. 740-743
Author(s):  
Hua Yu
Keyword(s):  
Heart Rate ◽  
Lactic Acid ◽  
Physical Exercise ◽  
Oxygen Uptake ◽  
Ketone Body ◽  
Work Capacity ◽  
Maximum Oxygen Uptake ◽  
Level Of Evidence ◽  
Exercise Load ◽  
Arterial Blood

ABSTRACT Introduction: Maximum oxygen uptake is an effective indicator of the level of human cardiopulmonary function and aerobic work capacity. Observing the effects of aerobic training and formulating scientific training plans are of considerable value. Objective: To observe the effect of physical exercise on the human body's maximum oxygen uptake and arterial blood ketone body ratio. Methods: Before and after 4 weeks of physical exercise, the maximum oxygen uptake, blood lactic acid and heart rate changes, and ketone body content in the incremental load exercise experiment was measured in the human body. Results: The subjects’ maximum oxygen uptake, maximum exercise load, heart rate, and blood lactic acid levels increased significantly after physical exercise. Conclusion: The human body's maximum oxygen uptake is enhanced under sports. Level of evidence II; Therapeutic studies - investigation of treatment results.

scholarly journals A Study of Skin-Close Heat and Moisture with Different Types of Backpacks in Cycling

Proceedings ◽  
2020 ◽  
Vol 49 (1) ◽  
pp. 86
Author(s):  
Mats Ainegren ◽  
Frank I. Michel ◽  
Robert Klauer ◽  
Andrey Koptyug ◽  
Mikael Bäckström ◽  
...  
Keyword(s):  
Heart Rate ◽  
Relative Humidity ◽  
Oxygen Uptake ◽  
Aerodynamic Drag ◽  
Force Plate ◽  
Mountain Bike ◽  
Different Types ◽  
Series Of Experiments ◽  
Lower Temperature ◽  
Heat And Moisture

The aim of this project was to evaluate effects of backpacks with different design intended for use during cycling on skin-close temperature and relative humidity, oxygen uptake, heart rate and aerodynamic drag. Seven subjects took part in the study cycling on a mountain bike mounted on a “smart trainer” placed on a force plate in a wind tunnel. Three series of experiments were carried out: without backpack, with conventional backpack and with a backpack having innovative rear panel design. As hypothesized, the results showed that an innovatively designed backpack with the ducts deflecting part of the airflow towards some areas of the user’s back provided lower temperature and relative humidity for the microclimate compared to a conventional backpack without airflow channels. Further, reference tests without any backpack resulted in the lowest temperature and humidity. However, no differences were found between the three tests for oxygen uptake, heart rate and aerodynamic drag.

Cardiorespiratory responses during prolonged exercise

1961 ◽  
Vol 16 (6) ◽  
pp. 997-1000 ◽  
Author(s):  
Ernest D. Michael ◽  
Kenneth E. Hutton ◽  
Steven M. Horvath
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Energy Cost ◽  
Prolonged Exercise ◽  
Bicycle Ergometer ◽  
Maximum Oxygen Uptake ◽  
Healthy Male ◽  
Heart Rates ◽  
Cardiorespiratory Responses ◽  
Male Subjects

Three healthy male subjects 20 years of age were exercised for 2—8 hr riding a bicycle ergometer or walking on a treadmill. Higher heart rates were found with the bicycle rides than with the walking exercises with equivalent oxygen uptakes. The subjects could not work on the bicycle ergometer at oxygen uptakes of 1.8 liters/min for more than 4 hr but could with this uptake walk 8 hr. The results indicated that an 8-hr period of exercise could be completed without undue fatigue whenever the energy cost did not exceed 35% of the maximum oxygen uptake where heart rates, oxygen uptakes, and rectal temperatures remained below 120 beats/min, 1.4 liters/min, and 38 C, respectively. The heart rate appeared to be the important factor for estimating 8-hr work endurance. A rate of 140 beats/min could not be maintained for more than 4 hr or a rate of 160 beats/min for more than 2 hr without extreme fatigue. Submitted on October 26, 1960

scholarly journals Cardiopulmonary fitness test among Nepalese students

2013 ◽  
Vol 1 (1) ◽  
pp. 3-8
Author(s):  
S Hada ◽  
S Amatya ◽  
K Gautam
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Total Duration ◽  
Prediction Equation ◽  
Maximum Oxygen Uptake ◽  
Step Test ◽  
Vo2 Max ◽  
Cardiopulmonary Fitness ◽  
Medical College ◽  
Rate Maximum

Background and Objectives: Maximum Oxygen uptake (VO2 max) is a good predictor of cardiopulmonary and muscle fitness. Maximum oxygen uptake is defined as the highest rate at which oxygen can be taken up and utilize by body during severe exercise. The present study aims to find out the level of VO2 max using Mc Ardle equation and to compare obtained values from Chatterjee’s equation in Nepalese population. Methodology: Maximum oxygen uptake was determined by using the Queen’s college step-stool of 16.25 inches and popular Mc Ardle equation. Stepping was done for a total duration of 3 minutes at the rate of 24 cycles per minute for males and 22 cycles per minute for females. After completion of the exercise, subjects remained standing while the carotid pulse rate was taken as heart rate. Maximum oxygen uptake was calculated using obtained heart rate. Results: Queen’s college step test (QCT) was used as a submaximal exercise and the estimated VO2 max in boys and girls was 48.8± 7.3 ml/kg/min and 37.4± 2.7 ml/kg/min respectively with Mc Ardle equation and the value was higher when compared with Chatterjee’s equations. The value of VO2 max was observed and found to be less in smokers and sedentary individuals. Conclusion: As the values of VO2 max obtained from different equations are different, this research strongly argues the need of developing a prediction equation specifically for the Nepalese population.DOI: http://dx.doi.org/10.3126/jmcjms.v1i1.7879 Janaki Medical College Journal of Medical Sciences (2013) Vol. 1 (1):3-8

scholarly journals Hot, humid air decontamination of aircraft confirmed that high temperature and high humidity are critical for inactivation of infectious, enveloped ribonucleic acid (RNA) virus

2020 ◽  
Author(s):  
Tony L. Buhr ◽  
Alice A. Young ◽  
Erica Borgers-Klonkowski ◽  
Neil L. Kennihan ◽  
Harold K. Barnette ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
High Temperature ◽  
Relative Humidity ◽  
Response Surface ◽  
Ribonucleic Acid ◽  
Rna Virus ◽  
High Humidity ◽  
Humid Air ◽  
Enveloped Virus ◽  
Aircraft Performance

ABSTRACTAimsTo develop infectious (live/dead) enveloped virus test indicators and Response Surface Methodology (RSM) models that evaluate survival of an enveloped ribonucleic acid (RNA) virus on contaminated aircraft materials after exposure to hot, humid air (HHA).Methods and ResultsEnveloped RNA bacteriophage Phi6 (Φ6) was dried on wiring insulation, aircraft performance coating (APC), polypropylene, and nylon at ≥ 8 log10 plaque-forming units (PFU) test coupon-1. Only 2.4 log10 inactivation was measured on APC at 70°Celsius (°C), 5% relative humidity (RH) after 24 h. In contrast, HHA RSM models showed a 90% probability of a 7-log10 inactivation at ≥63°C, 90% RH after 1 h, and decontamination kinetics were similar across different materials. HHA decontamination of C-130 and C-17 aircraft showed >7 log10 and ≥5.9 log10 inactivation of enveloped virus on 100 and 110 test indicators, respectively, with a 1-h treatment, excluding ramp-up and ramp-down times.ConclusionsEnveloped RNA virus test indicators were successfully developed, lab tested for HHA decontamination, analyzed for RSM, and field-tested in aircraft demonstrations.Significance and Impact of the StudyThe utility of HHA decontamination was demonstrated after inactivating enveloped RNA virus on aircraft with a 1-h HHA treatment within aircraft temperature and RH limits.

scholarly journals Optimization of the process parameters in rice mill using Response surface methodology (RSM)

2016 ◽  
Vol 8 (3) ◽  
pp. 1267-1277
Author(s):  
Kumkum Pandey ◽  
Deepa Vinay
Keyword(s):  
Heart Rate ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Reliability And Validity ◽  
Coefficient Of Determination ◽  
Operating Parameters ◽  
Vo2 Max ◽  
Reduce Heart Rate ◽  
Manual Handling ◽  
Load Weight

Objective of the current study was to analyze a wooden plank used as a loading ramp to perform manual handling task with a view to redesign and develop the new one for agriculture. Developed ramp was more wide, static and non slippery than the wooden plank. For this purpose experiments were conducted on a group of 10 experienced manual handlers in the KLA rice mill of Rudrapur Block, district Udhamsingh Nagar, Uttarakhand, India. The reliability and validity of the developed, modern loading ramp was assessed by using response surface methodology in terms of change in MSD, heart rate and VO2 max. Therefore RSM was applied to optimize the operating parameters of ramp such as load weight, height of ramp and time. As per Box Behenken design total 17 experiments were carried out. Each parameter was varied over three levels as load weight of 40, 50 and 60 kg., height of ramp 3, 4 and 5 feet, and the time viz. 3, 4 and 5 min. ANOVA test and coefficient of determination (R2) were applied. In result it was observed that use of developed pant loading ramp was able to reduce heart rate of selected respondent’s from 135.4 beats/min. to 126.76 beats/min., MSD from 85.45 to 22.80 % and VO2 max from 39.45 to 34L/min.

Cardiorespiratory Effects of Weight Reduction by Exercise in Middle-Aged Women with Obesity

1994 ◽  
Vol 22 (3) ◽  
pp. 160-164 ◽  
Author(s):  
J Katoh ◽  
Y Hara ◽  
K Narutaki
Keyword(s):  
Body Mass Index ◽  
Heart Rate ◽  
Oxygen Uptake ◽  
Body Mass ◽  
Weight Reduction ◽  
The Body ◽  
Maximum Oxygen Uptake ◽  
Middle Aged ◽  
Physical Strength ◽  
Exercise Period

The cardiorespiratory responses to weight reduction due to physical exercise were examined in fourteen women with obesity, aged 36 to 67 years (Body Mass Index, 32.4 ± 1.4 kg/m2). The patients were instructed to exercise at approximately 60% of maximum oxygen uptake for 2 h every day for approximately 3 months. To evaluate physical strength, a graded cycling exercise test was performed both before and after the exercise period, monitoring gas exchange, ventilation, and heart rate. After the exercise period the body mass index and percentage fat both decreased by 11% and 18%, respectively ( P < 0.001), although lean body mass did not change; maximum oxygen uptake and maximum heart rate did not change significantly, but peak ventilation equivalent, maximum metabolic equivalent and maximum load increased by 12%, 14% and 11%, respectively ( P < 0.05, P < 0.001 and P < 0.001, respectively). Maximum oxygen uptake per unit body weight increased by 5% ( P < 0.001). These results suggest that weight reduction as a result of exercise improves cardiorespiratory function in middle-aged women with obesity.

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