Warianty tytułu
Low precision of estimation of 24 hour human energy expenditure as a factor limiting dietary behavior
Języki publikacji
Abstrakty
W niniejszej pracy zmierzono tempo podstawowej przemiany materii 6 młodych dorosłych osób i porównano je z wartościami obliczonymi ze wzorów. Pomiary wykonano aparaturą respirometryczną firmy Maihak w pomieszczeniu termostatowanym istniejącym w Katedrze Dietetyki SGGW. Uzyskane wyniki są zbieżne z danymi zawartymi w normach żywieniowych opublikowanych w USA, gdzie poziom wartości energetycznej diety zalecanej na przykład dla mężczyzn w wieku 23-50 lat i o masie ciała 70 kg waha się w granicach od 2300 kcal/d do 3100 kcal/d, czyli uwzględnia różnice indywidualne rzędu 30%.
The starting point for energetic value of the diet is basic metabolism rate (BMR). It's value is evaluated with the formulas proposed by WHO which have been applied in Poland since 1995 [4]. These formulas take into account sex, age and body mass of human. These formulas present average values which arc representative for multimillion populations of people who arc of different nationality but have similar parameters as above mentioned. There is very few published data about variability between and within individuals in the discussed scope. Experts' Commission of FAO/WHO/UNU [7] published that variability factor which characterizes variability of weekly metabolism of people with similar parameters which were taken into account is 12,5 %, and analogical factor calculated for the same persons examined on different days varies between 10 to 6 % . In this research basic metabolism rate of 6 young adult persons was measured and compared with values calculated with formulas. The measurements were performed with respirometry equipment produced by Maihak company in thermostatic room which is in Department of Dietetics of Warsaw Agriculture University. It was shown that standard deviation of 6 differences calculated between individual theoretic values of B M (calculated with formulas) and real values which were measured were as 4,13 % of arithmetical average of results which were taken into account. In some cases that difference was over 1000 kJ/d which is 13,4 % of value calculated with formulas. If we take into account that we often increase that value by about 50% to estimate 24 hour energy expenditure which takes into account thermogenesis effected by nutrition and energetic cost of movement activity, the discussed difference between the value calculated with formulas and real value which was individually measured increases to the level of 20 % of the former value (calculated with formulas). Received results are similar with data included in nutrition standards published in USA [6], where the energetic value of recommended diet e.g. for man (m) of age 23-50 years and body mass 70 kg varies between 2300 kcal/d to 3100 kcal/d, and is taking into account individual differences in the rank of 30%. The differences in the rank of 20% proved in this relatively small research, which were between values estimated on the commonly applied formulas and real values which were measured states that there is so low preciseness of commonly performed estimation of 24 hour human energy expenditure, that it truly discredits appropriateness of this type of dietary guidance.
Wydawca
Czasopismo
Rocznik
Tom
Numer
Opis fizyczny
s.95-98,tab.,bibliogr.
Twórcy
Bibliografia
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.agro-article-5543c672-3a94-469f-9c95-7b48367b3ad4
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.