scholarly journals Manipulation of Dietary Intake on Changes in Circulating Testosterone Concentrations

Nutrients ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 3375
Author(s):  
Amit Zamir ◽  
Tavor Ben-Zeev ◽  
Jay R. Hoffman
Keyword(s):  
Athletic Performance ◽  
Nutrient Intake ◽  
Potential Mechanism ◽  
Concerted Effort ◽  
Micronutrient Intake ◽  
Competitive Athletes ◽  
Androgenic Steroids ◽  
Response To Exercise ◽  
Positive Effect ◽  
Energy And Nutrient Intake

Elevations in the circulating concentration of androgens are thought to have a positive effect on the anabolic processes leading to improved athletic performance. Anabolic-androgenic steroids have often been used by competitive athletes to augment this effect. Although there has been concerted effort on examining how manipulating training variables (e.g., intensity and volume of training) can influence the androgen response to exercise, there has been much less effort directed at understanding how changes in both macronutrient and micronutrient intake can impact the androgen response. Thus, the focus of this review is to examine the effect that manipulating energy and nutrient intake has on circulating concentrations of testosterone and what the potential mechanism is governing these changes.

scholarly journals Enegy expenditure, physical activity and basal metabolic rate of elderly subjects

1995 ◽  
Vol 73 (4) ◽  
pp. 571-581 ◽  
Author(s):  
Daphne L.E. Pannemans ◽  
Klaas R. Westerterp
Keyword(s):  
Physical Activity ◽  
Young Adults ◽  
Energy Expenditure ◽  
Metabolic Rate ◽  
Basal Metabolic Rate ◽  
Nutrient Intake ◽  
The Elderly ◽  
Activity Level ◽  
Positive Effect ◽  
Energy And Nutrient Intake

Energy expenditure, and therefore energy requirement, generally decreases with advancing age because of a decrease in basal metabolic rate (BMR) and physical activity. The aim of the present study was to measure total energy expenditure (EE) and activity level in a group of healthy elderly (sixteen men aged 71·3 (SD 4·9) years; ten women aged 67·6 (SD 4·1) years) and young adults (nineteen men aged 30·4 (SD 5·0) years; ten women aged 27·2 (SD 3·9) years) by using the doubly-labelled water method in combination with measurements of BMR. Age-related differences in body composition and their relationship to BMR and activity level were studied. EE was lower in elderly compared with young adults, partly due to a significantly lower BMR. The lower BMR was not fully explained by the lower fat-free mass (FFM) in the elderly. Energy expended (MJ/d) on activity was higher for the younger subjects although there was no significant difference in the physical activity index (PAI = EE/BMR) between the two age groups. The effect of physical activity level is twofold: first it has a positive effect on the BMR, and second it has a positive effect on the FFM. Both effects involve an increase in the total EE with an increased level of physical activity. At energy balance this will lead to increased energy and nutrient intake, making especially the elderly less vulnerable to inadequate energy and nutrient intake.

Influence of Maternal Education on Food Consumption and Energy and Nutrient Intake in a Group of Pre-School Children from Madrid

2003 ◽  
Vol 73 (6) ◽  
pp. 439-445 ◽  
Author(s):  
Navia ◽  
Ortega ◽  
Requejo ◽  
Perea ◽  
López-Sobaler ◽  
...  
Keyword(s):  
Food Consumption ◽  
School Children ◽  
Food Habits ◽  
Nutrient Intake ◽  
Maternal Education ◽  
Statistical Significance ◽  
Dietary Adequacy ◽  
Consumption Energy ◽  
Maternal Educational Level ◽  
Energy And Nutrient Intake

A study was conducted on the influence of maternal education level on food consumption, energy and nutrient intake, and dietary adequacy in 110 pre-school children from Madrid, Spain. With increasing maternal education, children consumed more sugar (p < 0.05), fruit (p < 0.05), and fish (p < 0.05). Snacking was more frequent with decreasing maternal education (p < 0.05). Though statistical significance was not reached, the consumption of pre-cooked foods was greater among children of mothers educated to a higher level, a phenomenon probably related to the work situation of these women. With respect to dietary composition, no significant differences were found between groups for macronutrient, fiber and energy intakes, except for energy supplied by polyunsaturated fatty acids (PUFA), which was greater in the children of less educated women (p < 0.01). This is probably due to their greater consumption of sunflower seed oil. The diets of children belonging to well-educated mothers came closer to meeting the recommended intakes for folate, vitamin C, and iodine. It would seem that maternal educational level influences the food habits of children. Mothers with less education may require special advice in this area.

scholarly journals Effects of competitive sports on temporomandibular dysfunction: a literature review

2020 ◽  
Vol 25 (1) ◽  
pp. 55-65
Author(s):  
Hannah Charlotte Freiwald ◽  
Nico Peter Schwarzbach ◽  
Anne Wolowski
Keyword(s):  
Literature Review ◽  
Athletic Performance ◽  
Anabolic Steroids ◽  
German Society ◽  
Competitive Sports ◽  
Inclusion Criteria ◽  
Temporomandibular Dysfunction ◽  
Competitive Athletes ◽  
Methodological Procedures ◽  
Everyday Stress

Abstract Objectives The German Society of Craniomandibular Function and Disorders recommends that patients suffering from temporomandibular dysfunctions should practice sports in order to compensate for everyday stress. This raises the question as to what extent competitive athletes develop temporomandibular dysfunctions or whether their athletic activities protect them. With the present literature review, the authors intend to give an overview of the currently available publications on this topic. Materials and methods A literature research in the PubMed and Google Scholar databases was performed to filter out the currently available publications on the topic ‚sports, and temporomandibular dysfunction. Results Out of 114 available articles, seven met the inclusion criteria. Two other relevant articles were found in the list of references, so that in total, nine publications were picked for the review. In case numbers ranging from eight to 347 subjects, a temporomandibular dysfunction was detected with a prevalence between 11.7% and 100% for athletes and between 11.11% and 14.3% for non-athletes. Different kinds of sports were evaluated, all of them contact sports: basketball, handball, wrestling, boxing, karate, mixed martial arts, field hockey, water polo, and soccer. One study compared athletes with and without consumption of anabolic steroids, regardless of the type of sport. The level of athletic performance varied across the different studies. Conclusions Currently, studies dealing with the effect of competitive sports on temporomandibular dysfunction are scarce. Inconsistent methodological procedures permit only limited comparability. Clinical relevance A general trend, however, can already be discerned: professional athletes suffer from temporomandibular dysfunctions more frequently than non-athletes.

Food habits and energy and nutrient intake in Swedish adolescents approaching the year 2000

1996 ◽  
Vol 85 (s415) ◽  
pp. 1-19 ◽  
Author(s):  
G Samuelson ◽  
L-E Bratteby ◽  
H Enghardt ◽  
M Hedgren
Keyword(s):  
Food Habits ◽  
Nutrient Intake ◽  
Year 2000 ◽  
Energy And Nutrient Intake

The Determination of Total Energy and Nutrient Intake in Older Adults in Turkey

2015 ◽  
Vol 9 (3) ◽  
pp. 319-326
Author(s):  
Nurcan Yabanci Ayhan ◽  
Pelin Bilgic ◽  
Isil Simsek ◽  
Muhittin Tayfur ◽  
Nobuko Hongu
Keyword(s):  
Older Adults ◽  
Total Energy ◽  
Nutrient Intake ◽  
Energy And Nutrient Intake

scholarly journals Associations between added sugars and micronutrient intakes and status: further analysis of data from the National Diet and Nutrition Survey of Young People aged 4 to 18 years

2008 ◽  
Vol 101 (1) ◽  
pp. 100-107 ◽  
Author(s):  
Sigrid Gibson ◽  
Alison Boyd
Keyword(s):  
Nutrient Intake ◽  
Transferrin Saturation ◽  
Dietary Intakes ◽  
Nutrition Survey ◽  
Added Sugars ◽  
Plasma Selenium ◽  
Micronutrient Intake ◽  
Dietary Records ◽  
Using Data ◽  
The Impact

Added sugars are often viewed as ‘empty calories’, negatively impacting micronutrient intakes, yet reviews consider the evidence inconclusive. This study aimed to quantify associations between dietary added sugars (as a percentage of energy) and micronutrient intake and biochemical status in the National Diet and Nutrition Survey. Using data from 1688 British children aged 4–18 years who completed 7 d weighed dietary records in 1997, micronutrient intakes were examined across quintiles of added sugars. After excluding low energy reporters, mean dietary intakes of most nutrients exceeded the reference nutrient intake, except for zinc. Compared with quintile 1 (9 % added sugars), high consumers in quintile 5 (23 % added sugars) had micronutrient intakes ranging from 24 % lower to 6 % higher (mean 14 % lower). Zinc intakes in quintile 1 v. quintile 5 averaged 93 % v. 78 % of reference nutrient intake; magnesium 114 % v. 94 %; iron 115 % v. 100 %; and vitamin A 111 % v. 92 %, respectively. Plasma levels of magnesium, zinc and carotenoids did not vary across quintiles, but weak negative correlations were observed with serum ferritin and transferrin saturation. Plasma selenium was inversely correlated with added sugars (r − 0·17; P < 0·0001) but there was no association with glutathione peroxidase. The impact of added sugars on micronutrient intakes appears modest overall but may have relevance for children consuming inadequate amounts of nutrient-rich foods coupled with a diet high in added sugars (approximately 23 %). Further work is needed to explore the impact of different sources of added sugars and to refine assessments of inadequate intakes and status.

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