scholarly journals Effects of Acute Caffeinated Coffee Consumption on Energy Utilization Related to Glucose and Lipid Oxidation from Short Submaximal Treadmill Exercise in Sedentary Men

2011 ◽  
Vol 4 ◽  
pp. NMI.S8299 ◽  
Author(s):  
Donrawee Leelarungrayub ◽  
Maliwan Sallepan ◽  
Sukanya Charoenwattana
Keyword(s):  
Lipid Oxidation ◽  
Antioxidant Capacity ◽  
Exercise Test ◽  
Complete Blood Count ◽  
Coffee Consumption ◽  
Lipid Peroxide ◽  
Energy Utilization ◽  
Maximal Heart Rate ◽  
Coffee Drinking ◽  
Caffeinated Coffee

Objective Aim of this study was to evaluate the short term effect of coffee drinking on energy utilization in sedentary men. Methods This study was performed in healthy sedentary men, who were randomized into three groups, control (n = 6), decaffeinated (n = 10), and caffeine (n = 10). The caffeine dose in coffee was rechecked and calculated for individual volunteers at 5 mg/kg. Baseline before drinking, complete blood count (CBC), glucose, antioxidant capacity, lipid peroxide, and caffeine in blood was evaluated. After drinking coffee for 1 hr, the submaximal exercise test with a modified Bruce protocol was carried out, and the VO2 and RER were analyzed individually at 80% maximal heart rate, then the blood was repeat evaluated. Results Three groups showed a nonsignificant difference in CBC results and physical characteristics. The caffeine group showed significant changes in all parameters; higher VO2 levels, ( P = 0.037) and lower RER ( P = 0.047), when compared to the baseline. Furthermore, the glucose level after exercise test increased significantly ( P = 0.033) as well as lipid peroxide levels ( P = 0.005), whereas antioxidant capacity did not change significantly ( P = 0.759), when compared to the before exercise testing. In addition, the blood caffeine level also increased only in the caffeine group ( P = 0.008). Conclusion Short consumption of caffeinated coffee (5 mg/kg of caffeine), improves energy utilization and relates to glucose derivation and lipid oxidation.

Caffeinated coffee consumption and mortality after acute myocardial infarction

2004 ◽  
Vol 147 (6) ◽  
pp. 999-1004 ◽  
Author(s):  
Kenneth J Mukamal ◽  
Malcolm Maclure ◽  
James E Muller ◽  
Jane B Sherwood ◽  
Murray A Mittleman
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Coffee Consumption ◽  
Caffeinated Coffee

Abstract P319: Association of Heart Rate Reserve with Incidence of Hypertension in Men

Circulation ◽  
2013 ◽  
Vol 127 (suppl_12) ◽  
Author(s):  
Vivek K Prasad ◽  
Gregory A Hand ◽  
Mei Sui ◽  
Duck C Lee ◽  
Deepika Shrestha ◽  
...  
Keyword(s):  
Heart Rate ◽  
Exercise Test ◽  
Heavy Drinking ◽  
Risk Groups ◽  
Hazard Ratio ◽  
Maximal Heart Rate ◽  
Heart Rate Reserve ◽  
Incident Hypertension ◽  
The Difference ◽  
Design And Methods

Abstract Objectives— We examined the association between heart rate reserve (HRR) and incident hypertension in men in the Aerobics Center Longitudinal Study. Research design and Methods— A total of 10418 healthy normotensive men, who did not have an abnormal electrocardiogram or a history of heart attack, stroke, cancer, or diabetes, performed a maximal treadmill exercise test and were followed for the incidence of hypertension. HRR was defined as the difference between maximal heart rate during exercise test and resting heart rate. Results— During a mean follow-up of 6 years, there were 2831 cases of incident hypertension. Compared with men in the reference category (the lowest quartile of HRR), the risk of incident hypertension was significantly lower in the highest quartile of HRR with a hazard ratio 0.67 (95% CI: 0.60-0.75) when adjusted for age and baseline examination year. Further adjustment for smoking, heavy drinking, body mass index (BMI), resting systolic and diastolic blood pressure, cholesterol, blood glucose and cardio respiratory fitness, resulted a hazard ratio of 0.84 (95% CI:0.74-0.95). This result was almost similar when we stratified them into younger and older men with hazard ratio of 0.77(95% CI: 0.62-0.98) and 0.78 (95% CI: 0.66-0.90) respectively. We also found a significant lower hypertension risk associated with higher HRR among high risk groups such as overweight, low fitness, or prehypertension with hazard ratio of 0.82(95% CI:0.70-0.97), 0.80(95% CI:0.67-0.96), 0.76(95% CI:0.64-0.88) respectively. Conclusion— Risk of Incident hypertension was significantly lower in men with higher HRR. High HRR was also associated with lower risk of developing hypertension irrespective of age and status of risk factors such as high BMI, low fitness and prehypertension. Therefore, HRR may be considered as a reliable exercise parameter for predicting the risk of incident hypertension.

Changes in physiological, haematological and biochemical parameters in police working dogs during a treadmill incremental exercise test

2020 ◽  
Vol 16 (5) ◽  
pp. 387-394
Author(s):  
J.C. Alves ◽  
A. Santos ◽  
P. Jorge ◽  
M.P. Lafuente
Keyword(s):  
Exercise Test ◽  
Biochemical Parameters ◽  
Complete Blood Count ◽  
Rest Period ◽  
Incremental Exercise ◽  
Total Plasma ◽  
Incremental Exercise Test ◽  
Total Plasma Protein ◽  
Working Dogs ◽  
Stage T1

This study aimed to evaluate the physiological, haematological and biochemical changes during a treadmill incremental exercise test (IET). Animals were submitted to five stages of 6 min each, at 6, 7, 8, 9 and 10 mph, at an inclination of 5%. Blood samples were collected at rest (T0), immediately after exercise (T5) and after a 20 min rest period (T6), to determine complete blood count, urea, creatinine, creatine kinase, aspartate aminotransferase, alanine aminotransferase, lactate dehydrogenase, total plasma protein, albumin, alkaline phosphatase (AP), cholesterol, triglycerides (Trig), Ca2+, Na+, K+ and Cl-. Blood lactate (BL), heart rate (HR), rectal temperature (RT) and glycaemia were measured at rest (T0), after each stage (T1-T5) and after the rest period (T6). Variations were recorded between T0 and T5 in red blood cells, haemoglobin, AP, Na+, K+ (P<0.01), Trig (P<0.05), Ca2+ and Cl- (P<0.02). Differences were observed in BL at T5 (P<0.02) and T6 (P<0.02), RT at T2-T6 (P<0.01), HR at T3-T5 (P<0.01) and glycaemia at T2-T4 (P<0.01) and T5 (P<0.05). This study is a novel description of the shifts of physical fit police working dogs during this IET protocol.

scholarly journals Association of Caffeine Intake and Caffeinated Coffee Consumption With Risk of Incident Rosacea in Women

2018 ◽  
Vol 154 (12) ◽  
pp. 1394 ◽  
Author(s):  
Suyun Li ◽  
Michael L. Chen ◽  
Aaron M. Drucker ◽  
Eunyoung Cho ◽  
Hao Geng ◽  
...  
Keyword(s):  
Coffee Consumption ◽  
Caffeine Intake ◽  
Caffeinated Coffee

scholarly journals Autonomic cardiovascular response during and after a graded exercise test in concussed athletes and healthy controls

2021 ◽  
Vol 5 ◽  
pp. 205970022110448
Author(s):  
Alessandra Ventura ◽  
Fausto Romano ◽  
Mario Bizzini ◽  
Antonella Palla ◽  
Nina Feddermann
Keyword(s):  
Heart Rate ◽  
Cardiovascular System ◽  
Exercise Test ◽  
Cardiovascular Response ◽  
Heart Rate Recovery ◽  
Exercise Intolerance ◽  
Maximal Heart Rate ◽  
Healthy Controls ◽  
Graded Exercise Test ◽  
Graded Exercise

Objective Dysfunction of the autonomic cardiovascular system after a concussion is known to cause exercise intolerance due to symptoms exacerbation. The aim of this study was to compare athletes with symptoms of a sport-related concussion and healthy controls with regard to their heart rate during a graded exercise test and their heart rate recovery during the 5 min cool-down after the graded exercise test. Methods Sport-related concussion patients ( N = 61; 31% female) and controls ( N = 16; 50% female) participated in a graded exercise test on a cycle ergometer followed by 5 min active cool-down. Based on the results of graded exercise tests they were divided into four groups: (1) patients who reached the symptom threshold and had to stop the graded exercise test (symptom threshold; N = 39; 33.3% female), (2) patients with symptoms who finished the graded exercise test (S; N = 16; 25% female), (3) patients without symptoms (NS; N = 6; 33.3% female), (4) controls ( N = 16; 50% female). Main outcome measures Heart rate, severity of headache and dizziness during graded exercise test, heart rate recovery (median (heart rate recoveries/maximal heart rate) ± median absolute deviation (MAD)) 30, 60 and 300 s after the start of cool-down. Results Heart rate recovery at 30 s was significantly slower in symptom (0.95 ± 0.01) compared to all other groups ( p < 0.002; symptom threshold: 0.92 ± 0.02, NS: 0.91 ± 0.02, controls: 0.93 ± 0.02). Heart rate recovery at 60 s was significantly slower in symptom (0.90 ± 0.02) compared to the symptom threshold and controls ( p < 0.041; 0.86 ± 0.03, 0.85 ± 0.04). Heart rate recovery at 300 s was significantly slower in symptom threshold (0.72 ± 0.05) compared to controls ( p = 0.003; 0.66 ± 0.02). Conclusions Heart rate measurements in athletes with symptoms of sport-related concussion should be continued during cool-down after the graded exercise test, as dysfunction of the autonomic cardiovascular system might manifest also during cool-down.

scholarly journals The effect of lyophilization on selected biologically active components (vitamin C, catalase, lysozyme), total antioxidant capacity and lipid oxidation in human milk

2017 ◽  
Vol 112 (3) ◽  
pp. 121-128
Author(s):  
Dorota Martysiak-Żurowska ◽  
Małgorzata Puta ◽  
Anna Rodzik ◽  
Edyta Malinowska-Pańczyk
Keyword(s):  
Vitamin C ◽  
Human Milk ◽  
Lipid Oxidation ◽  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Freeze Drying ◽  
Biologically Active ◽  
Initial Water Content ◽  
Initial Water ◽  
Total Antioxidant

Human milk is rich in polyunsaturated fatty acids, as well as lysozyme, vitamin C and other bioactive compounds. The effect of lyophilization on the content of antioxidants (vitamin C and catalase CAT), bactericidal compounds (lysozyme), total antioxidant capacity (TAC) and lipid peroxidation in human milk was investigated in this study. Samples of mature human milk were collected from five healthy women who gave birth on the scheduled date and without complications. Freeze drying resulted in the removal of 88.2 % of the initial water content from milk. The human milk lyophilizate was readily soluble in water. Lyophilization had no effect on the content of primary (lipid peroxides LP) and secondary (thiobarbituric acid reactive substances TBARS) products of lipid oxidation. Freeze-drying led to a significant decrease in the vitamin C content and TAC values of milk (by 31 % and 16.5 %, respectively). Catalase and lysozyme were resistant to freeze-drying. Lyophilization induced a decrease in lysozyme content (9 %) and catalase activity (11 %) but these changes were not statistically significant. Low-temperature dehydration and rehydration of human milk lyophilizates promote satisfactory retention of biologically active ingredients and prevent the oxidation of human milk lipids. The results of this study indicate that lyophilization can be considered as an effective method for prolonging the shelf life of human milk.

scholarly journals Inverse association between coffee drinking and serum uric acid concentrations in middle-aged Japanese males

1999 ◽  
Vol 82 (2) ◽  
pp. 125-130 ◽  
Author(s):  
C. Kiyohara ◽  
S. Kono ◽  
S. Honjo ◽  
I. Todoroki ◽  
Y. Sakurai ◽  
...  
Keyword(s):  
Uric Acid ◽  
Serum Uric Acid ◽  
Green Tea ◽  
Acid Concentration ◽  
Coffee Consumption ◽  
Uric Acid Concentration ◽  
Coffee Drinking ◽  
Serum Uric Acid Concentration ◽  
The Relationship ◽  
Self Defence

Consumption of caffeine-rich beverages, which have diuretic properties, may decrease serum uric acid concentrations. We examined cross-sectionally the relationship of coffee and green tea consumption to serum uric acid concentrations in 2240 male self-defence officials who received a pre-retirement health examination at four hospitals of the Self-Defence Forces between 1993 and 1994. The mean levels of coffee and green tea consumption were 2·3 and 3·1 cups/d respectively. There was a clear inverse relationship between coffee consumption and serum uric acid concentration. When adjusted for hospital only, those consuming less than one cup of coffee daily had a mean serum uric acid concentration of 60 mg/l, while that of those drinking five or more cups of coffee daily was 56 mg/l (P < 0·0001). No such relationship was observed for green tea, another major dietary source of caffeine in Japan. The relationship between coffee consumption and serum uric acid concentration was independent of age, rank in the Self-Defence Forces, BMI, systolic blood pressure, serum creatinine, serum total cholesterol and serum HDL-cholesterol concentrations, smoking status, alcohol use, beer consumption and intake of dairy products. These findings suggest that coffee drinking may be associated with lower concentrations of serum uric acid, and further studies are needed to confirm the association.

The Effect of Caffeine Consumed Before Competition on Heart Rate, Trigger Squeeze Time and Shooting Score in Air Pistol Athletes

2021 ◽  
Vol 15 (11) ◽  
pp. 3202-3205
Author(s):  
Kadir Diler ◽  
Gamze Erikoğlu Örer
Keyword(s):  
Heart Rate ◽  
Female Athletes ◽  
Coffee Consumption ◽  
Wilcoxon Test ◽  
Caffeine Consumption ◽  
Male Athletes ◽  
Sports History ◽  
Negative Effect ◽  
Caffeinated Coffee ◽  
Single Blind

Background: Caffeine consumption may adversely affect the performance of athletes in some sports. Aim: The aim of this study was to investigate the effects of caffeine drink consumed before competitions by air pistol athletes on their heart rate, trigger squeeze times and shooting scores. Methods: : In the study, caffeinated and caffeine-free measurements were applied on the same athletes. Following the evaluation, a total of 20 elite athletes, including 10 women with a mean age of 23.6±4.7 and 10 men with a mean age of 25.9±4.8 who had at least 2 years sports history, participated voluntarily in the study. The study was planned as a single blind. All athletes shot 10 times before both measurements. By random method, the athletes consumed Coffee with 3mg/kg caffeine or decaf coffee before the measurement. After 1 week, the same athletes were given coffee which was not given in the previous measurement before the measurement. A total of 80 shots were fired at 15, 30 and 60 minutes after both measurements. Following the evaluation, heart rates, trigger squeeze times and shooting scores of the athletes were recorded. Wilcoxon test to compare the differences between the measurements at two different times on the same group and Mann-Whitney U test to examine the differences in independent groups were used. Results: When the differences between the measurements of all male and female athletes were examined, it was found that there was an increase in their heart rate and trigger squeeze times 15, 30 and 60 minutes after caffeinated coffee consumption, and this difference was statistically significant (p<0.05). Besides there was a significant decrease in 15, 30 and 60 minute shooting scores of female athletes, and 15 and 30 minute shooting scores of male athletes (p<0.05). Conclusion: As a result of the study, it was observed that the use of caffeine had a negative effect on the performance of air pistol athletes. Therefore, it can be said that people interested in air pistol discipline should not consume coffee or caffeine-containing beverages within 1-2 hours before the competition, if they consume, their heart rate will increase and their aiming during shooting will be more difficult and trigger-squeezing times will be extended. Keywords: Air pistol, Caffeine, Heart rate, Shooting

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