Influence of a carbohydrate drink on performance of military personnel in NBC protective clothing

Background: The increased threat of nuclear, biological and chemical (NBC) weapons underlines the need of protective clothing and gas masks, but this may impair performance. Thus, attention should be focused on the nutritional requirements. Hypothesis: Optimal performance is guaranteed if the supply of water and energy is adequate. Methods: Two...

Vitamin B-6 supplementation in elderly men: Effects on mood, memory, performance and mental effort

Marginal deficiencies of thiamin, riboflavin, vitamin B-6 and vitamin C: prevalence and functional consequences in man

Polyunsaturated fatty acid consumption, plasma cholesterol concentration and neuroendocrine response to mental and physical task load

This study was designed to investigate the relation between fatty acid consumption, total plama cholesterol and neuroendocrine response to exposure to stress, factors thought to play a role in the development of coronary heart disease. For this purpose 32 apparently healthy male volunteers were classified on the basis of their plasma cholesterol...

Effects of moderate alcohol consumption on platelet aggregation, fibrinolysis, and blood lipids

To investigate the effect of moderate alcohol consumption on blood constituents related to cardiovascular disease, 12 male volunteers consumed (instead of their usual alcoholic drinks) four different standardized amounts of red wine in addition to their habitual diet. Each dose was given to the subjects during a period of 5 weeks in a randomized...

Nutritional aspects of military feeding

Type A behaviour, borderline hyperventilation and psychological, psychosomatic and neuroendocrine responses to mental task load

Psychological, psychosomatic and neuroendocrine (in blood) responses to mental task load were investigated in relation to type A behaviour and borderline hyperventilation. For this purpose 32 apparently healthy, male volunteers were classified on the basis of their scores on the Jenkins Activity Survey (JAS) and on a questionnaire assessing...

Effect of work load on free and sulfate-conjugated plasma catecholamines, prolactin, and cortisol

The effects of maximal performance capacity and different work load intensities on the response of free and sulfate-conjugated plasma catecholamines, prolactin (PRL), and cortisol were studied in six healthy male volunteers. In a first experiment, the volunteers had to perform a step-wise incremental bicycle ergometer test to determine the onset...

Doping: een blik in de gereedschapskist

Krachtvoer: De mythe van pollen, biergist en dorstlessers

Zijn er bijzondere voedingsmiddelen die tot bijzondere pæstaties leiden? Naar zulke stoffen heeft de mens- en bepaald niet alleen de sportende mens - steeds naarstig gezocht. Gevonden is er trouwens ook heel wat. Voor het behoud of het verkrijgen van kracht en viriliteit, jeugd en schoonheid, voor het herstel van verschrikkelijke ziekten en voor...

Vitamins and endurance training: Food for running or faddish claims?

The inter-relationship of food and physical performance, food is considered as a conglomerate of nutrients and man is depicted as a kind of organic pudding. This 'machine' concept of human performance in combination with the mysticism surrounding vitamins, has led to the faddish belief that additional vitamins are necessary to improve physical...

De sporter op reis: Buikpijn in het buitenland

Wie eet wat, en wanneer? bij duursport, teamsport en (snel)krachtsport

De krachtexplosie waarmee de honderd meter in net tien seconden wordt afgelegd, vergt niet veel meer dan 35 kilocalorieën. Vergeleken met zwoegende etapperenners (1750 kcal per uur als het heel hard gaat), Kanaalzwemmers (1500 kcal) en langlaufers (1600 kcal) schijnt zo'n licht sprintertje maar heel weinig energie te gebruiken. Of toch niet? Om...

Therelationship of diet, body composition, physical activity and quality of metabolic control to blood lipid levels in type-I-diabetic men

Twenty seven male patients, with Type-I diabetes mellitus were studied, all from the Outpatient Clinic of the Department of Internal Medicine, the Free University Hospital, Amsterdam. In comparison with healthy subjects and as regards age, total cholesterol and LDL-cholesterol levels were within normal limits, although HDL-cholesterol and...