scholarly journals Sex Differences in Cardiovascular Response to Handgrip Exercise among Apparently Healthy Young Adult Nigerians

2016 ◽  
Vol 7 (2) ◽  
2007 ◽  
Vol 103 (4) ◽  
pp. 1402-1411 ◽  
Author(s):  
Savio W. Wong ◽  
Derek S. Kimmerly ◽  
Nicholas Massé ◽  
Ravi S. Menon ◽  
David F. Cechetto ◽  
...  

In general, cardiac regulation is dominated by the sympathetic and parasympathetic nervous systems in men and women, respectively. Our recent study had revealed sex differences in the forebrain network associated with sympathoexcitatory response to baroreceptor unloading. The present study further examined the sex differences in forebrain modulation of cardiovagal response at the onset of isometric exercise. Forebrain activity in healthy men ( n = 8) and women ( n = 9) was measured using functional magnetic resonance imaging during 5 and 35% maximal voluntary contraction handgrip exercise. Heart rate (HR), mean arterial pressure (MAP), and muscle sympathetic nerve activity (MSNA) were collected in a separate recording session. During the exercise, HR and MAP increased progressively, while MSNA was suppressed ( P < 0.05). Relative to men, women demonstrated smaller HR (8 ± 2 vs. 18 ± 3 beats/min) and MAP (3 ± 2 vs. 11 ± 2 mmHg) responses to the 35% maximal voluntary contraction trials ( P < 0.05). Although a similar forebrain network was activated in both groups, the smaller cardiovascular response in women was reflected in a weaker insular cortex activation. Nevertheless, men did not show a stronger deactivation at the ventral medial prefrontal cortex, which has been associated with modulating cardiovagal activity. In contrast, the smaller cardiovascular response in women related to their stronger suppression of the dorsal anterior cingulate cortex activity, which has been associated with sympathetic control of the heart. Our findings revealed sex differences in both the physiological and forebrain responses to isometric exercise.


2018 ◽  
Vol 50 (5S) ◽  
pp. 81
Author(s):  
Samantha C. Orr ◽  
Mary A. Elsesser ◽  
Ryan T. Tyler ◽  
Timothy A. Rengers ◽  
Evan Eschker ◽  
...  

Author(s):  
Girolamo Catapano Minotti ◽  
Francesca Cortese ◽  
Andrea Corsonello ◽  
Giovanni Guadalupi ◽  
Antonio Paolo D`Arcangelo ◽  
...  

2021 ◽  
Vol 9 (1) ◽  
pp. 1-7
Author(s):  
Moutawakilou Gomina ◽  
Edwige Lawin ◽  
Tarik Salifou ◽  
Gilbert Djidonou ◽  
Stanislas Zinsou

Background: Daily consumption of fruits is recommended due to their positive impact on the control of glycemia, cholesterol and coronary heart disease. Objectives: This study aimed to determine the glycemic index and glycemic load (GL) of four local fruits grown in Benin, namely papaya, pineapple, watermelon and grafted mango, among apparently healthy young adult subjects. Methods: This research work, being an interventional study of quasi-experimental category, involved 33 voluntary adult subjects (mean age: 23.4±1.9 years; mean body mass index: 21.38±1.89 kg/m2 ) distributed into 4 groups. The subjects of each group consumed the reference food (25 g of glucose or 50 g of white bread) twice a week with an interval of one week, and then a serving equivalent to 25 g of carbohydrates of each tested fruit in the morning after a 12-hour fasting on the evening. Plasma glucose was measured at 0, 15, 30, 45, 60, 90, and 120 minutes after food ingestion. Data were analyzed by one-way analysis of variance (ANOVA, SPSS, 26). The P < 0.05 was regarded as the significance level. Results: The incremental area under the curve mean value in mmol.L-1.min-1 of pineapple (89.21±21.75) was higher (P <0.001) than those of mango (34.71±13.62), papaya (23.46±15.06) and watermelon (20.30±16.47). The mean glycemic index of mango (117.09±58.32) was significantly higher (P =0.007) than the ones of pineapple (52.97±29.87), papaya (46.77±45.77), and watermelon (41.04±34.06). The mean GL of mango (16.28±8.11) was significantly more elevated (P =0.001) than the ones of papaya (3.41±3.34), pineapple (6.36±3.58), and watermelon (2.54±2.11). Conclusion: Watermelon, papaya and pineapple may therefore be recommended for safe consumption in accordance with dietary guidelines.


2019 ◽  
pp. 114-119
Author(s):  
Oluwadare Ogunlade ◽  
Chukwunenye Princely Anyanwu ◽  
Muritala Abiola Asafa ◽  
Omotayo Alaba Eluwole ◽  
Adebola Adetiloye

1969 ◽  
Vol 47 (6) ◽  
pp. 1355-1362
Author(s):  
Jean E. Mills Westermann ◽  
Vibeke E. Engelbert

Counts of granulocytes were performed on thymic imprints from normal rabbits 3 days old, 2–3 weeks old, and young adults, and from young adult rabbits mildly and severely parasitized with coccidiosis. Analyses of percentages of eosinophils, heterophils, and basophils indicated no sex differences. Comparisons of relative numbers of granulocytes in normal rabbits showed that young adult rabbits possessed more eosinophils and fewer basophils than the younger groups (no differences in heterophils); 3-day-old rabbits had more eosinophils than the 2-to 3-week animals (no differences in heterophils and basophils). No differences in relative numbers of the various granulocytes were found in the mildly and severely parasitized rabbits, but there was a decrease in eosinophils in the parasitized rabbits when compared with the young normal adult rabbits. Eosinophilic leukocytes were divided into two groups: the mononuclear "tissue" line and the lobated "blood" line of development. In the 3-day-old rabbits about 95% of eosinophils were of the lobed variety but in the older normal rabbits, the two developmental lines were about equal in numbers. When compared with the normal young adult rabbits, parasitized rabbits have increased percentages of "blood" eosinophils as a result of greater numbers of band and polymorphonuclear cells.


Sign in / Sign up

Export Citation Format

Share Document