scholarly journals Diurnal Variation: Does it Affect Short-term Maximal Performance and Biological Parameters in Police Officers?

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Ismail Dergaa ◽  
Amit Varma ◽  
Sarah Musa ◽  
Mokhtar Chaabane ◽  
Ali Ben Salem ◽  
...  
Keyword(s):  
Diurnal Variation ◽  
Biological Markers ◽  
Police Officers ◽  
Blood Cells ◽  
Hematological Parameters ◽  
Average Power ◽  
Diurnal Fluctuation ◽  
Exercise Session ◽  
Short Term ◽  
Maximal Performance

Objectives: This study aimed to assess the diurnal variation of short term maximal performance and biological markers of hormonal [cortisol (CRT), testosterone (TST), melatonin (MLT)], biochemical [creatine phosphokinase (CPK), blood glucose (GLC), uric acid (UA)] and hematological [white blood cells (WBC), monocytes (MO), neutrophils (NE), lymphocytes (LY), red blood cells (RBC), hemoglobin (HB), hematocrit (HMT)] parameters in male police officers. Methods: Twenty male police officers performed a running-based anaerobic sprint test (RAST) at two different times of the day (TOD), in the morning (6:00 h - 7:00 h) and evening (19:00 - 20:00) where blood samples were collected from the participants on these two occasions before each exercise session. Results: Short term maximal performance [Peak power (PP), average power (AP) and minimal power (MP)] was higher in the evening as compared to the morning. It was noted that biological markers of hormonal, biochemical and hematological parameters exhibit diurnal fluctuation. Some of them peak in the morning (MLT, CRT, TST, UA, RBC, HB, and HMT) and others peak in the evening (GLC, CPK, WBC, NE, LY, and MO). Conclusions: Short term maximal performance, hormonal, biochemical and hematological parameters were strongly affected by the TOD in police officers. Thus, understanding changes in short term maximal exercice and these circulating mediators during different TOD provide a better understanding of the anaerobic metabolism and could help modulate and quantify training load.

scholarly journals Diurnal Variation of Short-Term Repetitive Maximal Performance and Psychological Variables in Elite Judo Athletes

2018 ◽  
Vol 9 ◽  
Author(s):  
Hamdi Chtourou ◽  
Florian Azad Engel ◽  
Hassen Fakhfakh ◽  
Hazem Fakhfakh ◽  
Omar Hammouda ◽  
...  
Keyword(s):  
Diurnal Variation ◽  
Short Term ◽  
Psychological Variables ◽  
Maximal Performance ◽  
Judo Athletes

Intraday variation in short-term maximal performance: effects of different warm-up modalities

2021 ◽  
Author(s):  
Hana Baklouti ◽  
Asma Aloui ◽  
Davide Malatesta ◽  
Souad Baklouti ◽  
Nizar Souissi ◽  
...  
Keyword(s):  
Short Term ◽  
Warm Up ◽  
Maximal Performance ◽  
Performance Effects

scholarly journals Acute Exercise Increases Adiponectin Levels in Abdominally Obese Men

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Travis J. Saunders ◽  
Andrew Palombella ◽  
K. Ashlee McGuire ◽  
Peter M. Janiszewski ◽  
Jean-Pierre Després ◽  
...  
Keyword(s):  
Aerobic Exercise ◽  
Acute Exercise ◽  
Treadmill Exercise ◽  
Aerobic Exercise Training ◽  
Exercise Session ◽  
Short Term ◽  
Acute Bout ◽  
Plasma Adiponectin ◽  
Peak Intensity ◽  
Before And After

Objective. To examine the effect of acute and short-term (~1 week) aerobic exercise training on plasma adiponectin levels in inactive, abdominally obese men.Materials and Methods. Inactive and abdominally obese men (n=38, waist circumference ≥102 cm) recruited from Kingston, Canada were randomly allocated to perform three bouts of aerobic treadmill exercise at either low (50% VO2peak) or high (75% VO2peak) intensity during a 1-week period. Blood samples were taken before and after the first exercise session and 24–72 hours following the completion of the final exercise session.Results. Adiponectin levels were elevated immediately following an acute bout of exercise at both high and low intensities (High:5.79±0.42versus5.05±0.41 ug/mL; Low:5.24±0.44versus4.37±0.44 ug/mL,P<0.05) and remained elevated following 30 minutes of rest. In comparison to baseline, adiponectin levels were also elevated 24–72 hours following the final exercise session (High:5.47±0.48versus4.88±0.48 ug/mL; Low:5.18±0.49versus4.47±0.49 ug/mL,P<0.05).Conclusion. Both acute and short-term aerobic exercise result in a significant increase in plasma adiponectin levels in inactive, abdominally obese men independent of intensity.

Gene Expression Analysis in Human Peripheral Blood Cells after 900 MHz RF-EMF Short-Term Exposure

2018 ◽  
Vol 189 (5) ◽  
pp. 529-540 ◽  
Author(s):  
Andreas Lamkowski ◽  
Matthias Kreitlow ◽  
Jörg Radunz ◽  
Martin Willenbockel ◽  
Frank Sabath ◽  
...  
Keyword(s):  
Gene Expression ◽  
Expression Analysis ◽  
Peripheral Blood ◽  
Blood Cells ◽  
Gene Expression Analysis ◽  
Human Peripheral Blood ◽  
Peripheral Blood Cells ◽  
Short Term ◽  
Short Term Exposure

Hematological condition of breeding bulls after a long winter period of operation in the conditions of the Udmurt Republic

2022 ◽  
pp. 67-73
Author(s):  
A. Abilov ◽  
A. Azhmyakov ◽  
I. Novgorodova ◽  
N. Bogolyubova
Keyword(s):  
Red Blood Cells ◽  
Reference Values ◽  
Blood Cells ◽  
Hematological Parameters ◽  
White Blood Cells ◽  
Winter Period ◽  
Black And White ◽  
Significant Difference ◽  
White Breed ◽  
Udmurt Republic

Purpose: to study hematological parameters of blood in bulls-producers of dairy breeds on the day of semen collection in the Udmurt Republic after a long winter period of operation, depending on the breeds, age and place of selection.Materials and methods. The work was performed at the Federal Research Center for Animal Husbandry named after Academy Member L. K. Ernst on the basis of AO "Udmurtplem" of the Udmurt Republic in the period from 2020 to 2021 on dairy bulls (n=20) aged 15-69 months, including a purebred Holstein breed of domestic selection (n=6), a Holstein black-and-white breed of European selection (the Netherlands, n=6), a black-and-white breed with blood transfusion on Holsteins on at the level of 94-98% (n=8). The content of white blood cells, red blood cells, hemoglobin and hematocrit, depending on age and breed, was studied on the ABC VET hematological analyzer on the day of taking the seed.Results. It was found that on average, in 20 bulls aged 15-69 months, the level of white blood cells was at the level of reference values of 8.8±0.25 x 109/l, red blood cells 10.3 x 1012/l, which is 50% more than the reference values. The concentration of hemoglobin is 128.0±2.92 g/l, hematocrit is on average 54.3%, with a norm of 24-46%. Breeding bulls at a reliable level, differing in age, showed that some animals had high indicators for red blood cells of 10.3±0.26 x 102, for hematocrit of 54.3% against 24-46% of reference values. Also, according to hematological indicators, there was a tendency to increase the concentration of hemoglobin and hematocrit in European-bred bulls.Conclusion. The study of the variability in hematological parameters depending on the selection showed that there is no significant difference in leukocytes and all indicators are at the level of reference values, and in erythrocytes more than 50% than the highest indicators. The highest hemoglobin values were at the level of 141-156 g/l instead of 128 g/l according to the highest reference values. Hematocrit also showed high max values in all groups in comparison with the reference values of 59-66% versus 46% in the norm. It is necessary when analyzing hematological blood parameters in addition to the average statistical indicators (M+m) also, monitor the variability (min-max) in order to obtain more objective information.

scholarly journals Reproducibility of 24-h post-exercise changes in energy intake in overweight and obese women using current methodology

2011 ◽  
Vol 108 (2) ◽  
pp. 191-194 ◽  
Author(s):  
Gemma L. Brown ◽  
Michael E. Lean ◽  
Catherine R. Hankey
Keyword(s):  
Energy Intake ◽  
Exercise Intervention ◽  
Statistical Significance ◽  
Intraclass Correlation ◽  
Large Degree ◽  
Exercise Session ◽  
Fat Intake ◽  
Obese Women ◽  
Short Term ◽  
Post Exercise

Direct observation(s) of energy intake (EI) via buffet meals served in the laboratory are often carried out within short-term exercise intervention studies. The reproducibility of values obtained has not been assessed either under resting control conditions or post-exercise, in overweight and obese females. A total of fourteen sedentary, pre-menopausal females (BMI 30·0 (sd5·1) kg/m2) completed four trials; two exercise and two control. Each trial lasted 24 h spanning over 2 d; conducted from afternoon on day 1 and morning on day 2. An exercise session to expend 1·65 MJ was completed on day 1 of exercise trials, and three buffet meals were served during each trial. Reproducibility of post-exercise changes in energy and macronutrient intakes was assessed at each individual buffet meal by intraclass correlation coefficient (ri). Only therivalues for post-exercise changes in energy (ri0·44 (95 % CI − 0·03, 0·77),P = 0·03) and fat intake (ri0·51 (95 % CI 0·04, 0·81),P = 0·02) at the lunch buffet meal achieved statistical significance; however, theserivalues were weak and had large associated 95 % CI, which indicates a large degree of variability associated with these measurements. Energy and macronutrient intakes at the breakfast and evening buffet meals were not reproducible. This study concludes that the frequently used laboratory-based buffet meal method of assessing EI does not produce reliable, reproducible post-exercise changes in EI in overweight and obese women.

scholarly journals Influence of seasonality and pollution on the hematological parameters of the estuarine fish Centropomus parallelus

2013 ◽  
Vol 61 (2) ◽  
pp. 105-111 ◽  
Author(s):  
Robson Seriani ◽  
Denis Moledo de Souza Abessa ◽  
Camilo D. S. Pereira ◽  
Aline A. Kirschbaum ◽  
Andrea Assunção ◽  
...  
Keyword(s):  
Red Blood Cells ◽  
Blood Cells ◽  
Mean Corpuscular Volume ◽  
Hematological Parameters ◽  
Absolute Number ◽  
Aquatic Pollution ◽  
Estuarine Fish ◽  
Corpuscular Volume ◽  
Tropical Estuarine ◽  
Non Destructive

This study investigated the hematological parameters of the tropical estuarine fish Centropomus parallelus and their use as a non-destructive biomarker for aquatic pollution. Individuals were collected, in summer and winter, at two estuaries, Cananéia (CAN) and São Vicente (SVE), and blood was extracted by caudal puncture. The evaluated parameters were hematocrit (Ht), red blood cells (RBC), Mean Corpuscular Volume (MCV), and the leukocyte (WBC) and thrombocyte counts. Fishes from CAN showed higher values of absolute number of thrombocytes in the summer. The fishes from SVE presented lower values of Ht and MCV in winter. Comparing the hematological parameters of fishes from these two sites, Ht, MCV, WBC and RBC were higher in fishes from SVE in the summer, whereas during the winter, Ht and thrombocytes were higher in animals from SVE. The results allow attributing the changes in the blood of fishes to seasonality and the presence of contaminants.

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