scholarly journals Hematological, Hormonal and Fitness Indices in Youth Swimmers: Gender‐Related Comparisons

2019 ◽  
Vol 70 (1) ◽  
pp. 69-80
Author(s):  
Guang Cai ◽  
Jun Qiu ◽  
Shuai Chen ◽  
Qile Pan ◽  
Xunzhang Shen ◽  
...  
Keyword(s):  
Blood Cell ◽  
Red Blood Cell ◽  
Anaerobic Power ◽  
Anaerobic Capacity ◽  
Hemoglobin Concentration ◽  
Erythrocyte Indices ◽  
Testosterone Levels ◽  
Cell Counts ◽  
Blood Cell Counts ◽  
Aerobic And Anaerobic

Abstract This study objective was to evaluate gender differences in hematological, hormonal and fitness variables among youth swimmers and to explore relationships between erythrocyte indices and aerobic and anaerobic capacity. 137 girls and 171 boys participated in the study and were divided into three groups based on their training experience. Blood samples were obtained to determine red blood cell counts, hemoglobin concentration, hematocrit, and plasma erythropoietin and testosterone levels. VO2max was assessed using a submaximal cycle protocol. 76 girls and 102 boys also undertook a Wingate test to determine their peak anaerobic power. Boys had higher (p < 0.05) means than girls for all hematological variables except for erythropoietin and these variables demonstrated an increase with training in boys. The average VO2max in l∙min-1 and peak anaerobic power in watts were also higher in boys (2.91 ± 0.08 and 547 ± 28, respectively) than girls (2.25 ± 0.07 and 450 ± 26, respectively). Modest but significant (p < 0.05) correlations were found between VO2max and red blood cell counts (r = 0.252), hemoglobin concentration (r = 0.345), or hematocrit (r = 0.345) and between peak anaerobic power and red blood cell counts (r = 0.304), hemoglobin concentration (r = 0.319) or hematocrit (r = 0.351). This study revealed relatively lower yet age- and gender-appropriate hematological, hormonal and fitness indices in youth swimmers. The gender-related differences in erythrocyte indices seem unrelated to erythropoietin and may be explained by the higher testosterone levels seen in boys. Given their correlation to both aerobic and anaerobic capacity, erythrocyte indices may be used as part of talent identification for sports.

scholarly journals PO-116 Hematological, hormonal and fitness indices in youth swimmers: gender-related comparisons

2018 ◽  
Vol 1 (4) ◽  
Author(s):  
Jun Qiu ◽  
Guang Cai ◽  
Shuai Chen ◽  
Qile Pan ◽  
Xunzhang Shen ◽  
...  
Keyword(s):  
Gender Differences ◽  
Blood Cell ◽  
Red Blood Cell ◽  
Anaerobic Power ◽  
Hemoglobin Concentration ◽  
Erythrocyte Indices ◽  
Testosterone Levels ◽  
Cell Counts ◽  
Blood Cell Counts ◽  
Aerobic And Anaerobic

Objective This study was to evaluate gender differences in hematological, hormonal and fitness parameters among youth swimmers and to explore relationships between erythrocyte indices and aerobic and anaerobic capacity.  Methods 308 youth swimmers including 137 girls and 171 boys aged 8 to 16 volunteered to participate in this study, and they were divided into three (Beginner, intermediate and advanced) groups based on their training experiences. Blood samples were obtained to determine red blood cell counts, hemoglobin concentration, hematocrit, and serum erythropoietin and testosterone levels. VO2max was assessed using a submaximal cycle protocol. 76 girls and 102 boys also undertook a Wingate test to determine their peak anaerobic power. One-way analysis of variance (ANOVA) was used to compare gender differences in hematological indices hormonal indices and aerobic and anaerobic capacities. Two-way (gender × training) ANOVA was used to analyze the interactive effect of gender and training on hematological variables. Results Boys had higher (p<0.05) means than girls for all hematological variables except for erythropoietin and values demonstrated an increase with training in boys. The average VO2max in l∙min-1 and peak anaerobic power in watts were also higher in boys (2.91±0.08 and 547±28, respectively) than girls (2.25±0,07 and 450±26, respectively). Modest but significant (p<0.05) correlations were found between VO2max and red blood cell counts (r=0.252), hemoglobin concentration (r=0.345), or hematocrit (r=0.345) and between peak anaerobic power and red blood cell counts (r=0.304), hemoglobin concentration (r=0.319) or hematocrit (r=0.351).  Conclusions This study revealed relatively lower yet age- and gender-appropriate hematological, hormonal and fitness indices in youth swimmers. The gender-related differences in erythrocyte indices seems unrelated to erythropoietin and may be explained by the higher testosterone levels seen in boys. Erythrocyte indices may be used as part of talent identification for sports. 

scholarly journals Changes in Serum Lipids from Egg Consumption Are Associated with Clinical Erythrocyte Indices (P08-093-19)

2019 ◽  
Vol 3 (Supplement_1) ◽  
Author(s):  
Julia Greco ◽  
Allison Sloan ◽  
Christa Palancia Esposito ◽  
Aaron Van Dyke ◽  
Catherine Andersen
Keyword(s):  
Blood Cell ◽  
Total Cholesterol ◽  
Red Blood Cell ◽  
Serum Lipids ◽  
Hdl Cholesterol ◽  
Distribution Width ◽  
Erythrocyte Indices ◽  
Cell Counts ◽  
Blood Cell Counts ◽  
Induced Changes

Abstract Objectives Serum lipids may influence the lifespan of erythrocytes, and have been associated with clinical erythrocyte indices at the population level. Consumption of whole eggs vs. egg whites exerts varying effects on serum lipids and lipoprotein profiles; therefore, we investigated whether egg-induced changes in serum lipids correspond to changes in clinical erythrocyte markers. Methods Young, healthy men and women (18–35y, BMI < 30 kg/m2, n = 11) were recruited to participate in an ongoing intervention trial. All subjects followed an egg-free diet for 4 weeks, then were randomized to consume either 3 whole eggs or 3 egg whites per day for 4 weeks. Fasting serum lipids, complete blood cell counts, and dietary intake analysis was performed at the end of each study period. Results Average serum lipids and erythrocyte indices were within normal ranges at the end of each diet period. Changes in total cholesterol following the whole egg (+4.8%) and egg white (0.4%) diet period were not significant as compared to the egg-free diet period. Similarly, clinical erythrocyte markers were not significantly altered by daily consumption of whole eggs or egg whites. However, changes in total cholesterol and LDL-cholesterol between diet periods were positively correlated with changes in total red blood cell counts and hemoglobin. Total cholesterol was additionally correlated with hematocrit levels, and negatively associated with red cell distribution width. Total red blood cell counts and hemoglobin were further correlated with changes in the total cholesterol to HDL-cholesterol ratios, but not HDL-cholesterol alone. Conclusions Our findings indicate that egg-induced changes in serum lipids are associated with clinical erythrocyte indices, and that total cholesterol levels and dyslipidemia may be more significant determinants of erythrocyte profiles. Funding Sources This study was funded by an Agriculture and Food Research Initiative Grant from the USDA National Institute of Food and Agriculture.

scholarly journals Changes of Hematocrit, Hemoglobin, Serum Protein Levels and Red Blood Cell Counts Before and After Stroke

1976 ◽  
Vol 13 (4) ◽  
pp. 207-214
Author(s):  
Hiroshi Yamanouchi ◽  
Hideo Tohgi ◽  
Masakuni Kameyama ◽  
Mototaka Murakami ◽  
Tamotsu Matsuda
Keyword(s):  
Blood Cell ◽  
Serum Protein ◽  
Red Blood Cell ◽  
Protein Levels ◽  
Cell Counts ◽  
Blood Cell Counts ◽  
Before And After

Hematology distinguishes coastal and offshore forms of dolphins (Tursiops)

1983 ◽  
Vol 61 (4) ◽  
pp. 930-933 ◽  
Author(s):  
Deborah A. Duffield ◽  
Sam H. Ridgway ◽  
Lanny H. Cornell
Keyword(s):  
Blood Cell ◽  
Red Blood Cell ◽  
Tursiops Truncatus ◽  
Genetic Basis ◽  
Bottlenose Dolphins ◽  
Cell Counts ◽  
Blood Cell Counts ◽  
Cell Volumes

Bottlenose dolphins, Tursiops truncatus, can be separated into coastal and offshore ecotypes based upon hemoglobin levels, packed cell volumes, and red blood cell counts, the offshore form having higher values for all three measures. Captive-bred crosses between coastal and offshore types produce animals with intermediate hematologic profiles suggesting a significant genetic basis for these differences.

Are elevated fetal nucleated red blood cell counts an indirect reflection of enhanced erythropoietin activity?

2004 ◽  
Vol 190 (5) ◽  
pp. 1473-1475 ◽  
Author(s):  
Asaf Ferber ◽  
Zhanna Fridel ◽  
Alina Weissmann-Brenner ◽  
Victoria K Minior ◽  
Michael Y Divon
Keyword(s):  
Blood Cell ◽  
Red Blood Cell ◽  
Cell Counts ◽  
Blood Cell Counts ◽  
Nucleated Red Blood Cell

The Association of Red Blood Cell Counts with Endothelin-1 in African and Caucasian Women

2009 ◽  
Vol 31 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Hugo W. Huisman ◽  
Aletta E. Schutte ◽  
Johannes M. van Rooyen ◽  
Rudolph Schutte ◽  
Leoné Malan ◽  
...  
Keyword(s):  
Blood Cell ◽  
Red Blood Cell ◽  
Endothelin 1 ◽  
Cell Counts ◽  
Blood Cell Counts ◽  
Caucasian Women
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