Searched for: subject:"Exercise%5C+Test"
(1 - 11 of 11)
document
Daanen, H.A.M. (author), van Ling, S. (author), Tan, T.K. (author)
Background: It has been shown that endurance performance after one night of sleep deprivation is not compromised despite the feeling of fatigue and that, in contrast, performance in the heat deteriorates even though people may feel good. However, it is essentially unknown how the estimation of performance capabilities relate to actual...
article 2013
document
Bongers, B.C. (author), de Vries, S.I. (author), Helders, P.J.M. (author), Takken, T. (author)
PURPOSE: This study aimed to examine the reliability and validity of the steep ramp test (SRT), a feasible, maximal exercise test on a cycle ergometer that does not require the use of respiratory gas analysis, in healthy children and adolescents.METHODS: Seventy-five children were randomly divided in a reliability group (n = 37, 17 boys and 20...
article 2013
document
de Vries, S.I. (author), Hopman-Rock, M. (author), Bakker, I. (author), van Mechelen, W. (author), TNO Kwaliteit van Leven (author)
Purpose: To investigate the effect of guideline operationalization in terms of intensity threshold, bout duration, and days on the proportion of children meeting the health-related 60-min physical activity guideline using a subjective and an objective assessment method. Methods: Five hundred and twenty-one children (6-11 yr) completed a physical...
article 2009
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Daanen, H.A.M. (author), van Es, E.M. (author), de Graaf, J.L. (author), TNO Defensie en Veiligheid (author)
The maximal power that muscles can generate is reduced at low muscle temperatures. However, in prolonged heavy exercise in the heat, a high core temperature may be the factor limiting performance. Precooling has been shown to delay the attainment of hyperthermia. It is still unclear if the whole body should be cooled or if the active muscles...
article 2006
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Heus, R. (author), den Hartog, E.A. (author), Kistemaker, L.J.A. (author), van Dijk, W.J. (author), Swenker, G. (author), TNO Technische Menskunde (author)
Due to more stringent requirements to protect personnel against hazardous gasses, the inspiratory resistance of the present generation of respiratory protective devices tends to increase. Therefore an important question is to what extent inspiratory resistance may increase without giving problems during physical work. In this study the effects...
article 2004
document
Wertheim, A.H. (author), Kemper, H.C.G. (author), Heus, R. (author)
In previous studies on physical fatigue during simulated ship movements, the apparent exhaustion of subjects after experimentation suggested that the traditional index of physical workload, oxygen consumption expressed as the percentage of peak oxygen consumption (VO2-peak) measured in a separate graded exercise test (GXT), underestimates...
article 2002
document
de Looze, M.P. (author), van Greuningen, K. (author), Rebel, J. (author), Kingma, I. (author), Kuijer, P.P.F.M. (author)
In pushing and pulling wheeled carts, the direction of force exertion may, beside the force magnitude, considerably affect musculoskeletal loading. This paper describes how force direction changes as handle height and force level change, and the effects this has on the loads on the shoulder and low back. Eight subjects pushed against or pulled...
article 2000
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Jellema, W.T. (author), Imholz, B.P.M. (author), Oosting, H. (author), Wesseling, K.H. (author), van Lieshout, J.J. (author), TNO Biomedical Instrumentation (author)
Objective: The aim of this study was to compare beat-to-beat changes in stroke volume (SV) estimated by two different pressure wave analysis techniques during orthostatic stress testing: pulse contour analysis and Modelflow, ie, simulation of a three-element model of aortic input impedance. Methods: A reduction in SV was introduced in eight...
article 1999
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Gizdulich, P. (author), Imholz, B.P.M. (author), van den Meiracker, A.H. (author), Parati, G. (author), Wesseling, K.H. (author), TNO Biomedical Instrumentation (author)
Objective. Arterial pressure waveforms distort between brachial and finger arteries, causing differences mainly in systolic pressure. Distortion, reportedly, can be removed by applying a waveform filter to the finger pressure. Design. We analysed the data from two studies that detected discrepancies in systolic tracking between Finapres and...
article 1996
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Velthuis-te Wierik, E.J.M. (author), Hoogzaad, L.V. (author), van den Berg, H. (author), Schaafsma, G. (author), Instituut CIVO-Toxicologie en Voeding TNO (author)
Energy restriction (ER) has shown to be an effective 'anti-aging' factor in rodents, resulting in an increased life span and preventing or delaying the occurrence of many age-related diseases in rodents. As a part of a feasibility study on the potential application of ER in humans, we studied the effects of moderate ER on physical performance in...
article 1994
document
Havenith, G. (author), van Middendorp, H. (author)
An experiment was set up to quantify the relative influence of fitness, acclimatization, gender and anthropometric measures on physiological responses to heat stress. For this purpose, 12 male and 12 female subjects were exposed to a neutral [ambient temperature (T(a)) 21°C, relative humidity (r.h. 50%)], a warm, humid (T(a) 34°C, r.h. 80%) and...
article 1990
Searched for: subject:"Exercise%5C+Test"
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