1,721,054 research outputs found
Impedenza bioelettrica e composizione corporea
No full textQuesto testo tratta l’applicazione dell’analisi dell’impedenza bioelettrica (BIA, bioelectrical impedance analysis) allo studio della composizione corporea. La BIA consente una valutazione non invasiva dell’acqua corporea e della sua distribuzione tra gli spazi intra- ed extra-cellulare, di estremo interesse sia per il ricercatore che per il clinico. Per utilizzare correttamente quest’informazione, l’utilizzatore della BIA deve avere ben chiari i fondamenti fisici ed i limiti della metodica. Sfortunatamente, la letteratura fornisce numerosi esempi di “cattivo uso” della BIA, specialmente per quanto attiene alle sue applicazioni cliniche. Chi consulti questa letteratura senza una conoscenza specifica della composizione corporea, può essere tratto in inganno ed “abusare” della BIA. Questo testo, che si basa su un’esperienza decennale degli autori con la metodica, cerca di “fare ordine” sulla BIA, fornendo le basi indispensabili per la sua comprensione ed analizzando criticamente le sue applicazioni
Manuale di valutazione antropomentrica dello stato nutrizionale
No full textantropometrica, BMI, circonferenze, plich
Body water distribution and disease
No full textThe study of body water distribution between extra- and intra-cellular spaces has the potential to improve our knowledge on the mechanisms of disease. A major challenge is that of establishing whether commonly detected subclinical alterations of body water distribution have prognostic or clinical implications
RELATIVE EXPANSION OF EXTRACELLULAR WATER IN ELITE MALE-ATHLETES COMPARED TO RECREATIONAL SPORTSMEN
No full textThis study reports total body hydration and water distribution between the extracellular water (ECW) and the intracellular water (ICW) of a group of 15 elite male athletes compared with a group of 15 male subjects practising the same sport at 'amateur' level. Total body water (TBW) and ECW were assessed by means of deuterium and bromide dilution techniques respectively. Both TBW and body hydration were significantly higher in elite athletes than in non-competitive subjects (52.3 +/- 5.0 vs 46.1 +/- 4.2 litres p<0.001 and 63.2 +/- 1.9 vs 60.2 +/- 1.9% body weight, p<0.003 respectively). Likewise, both ECW the ratio of ECW to TBW were significantly higher in athletes than in control subjects (20.7 +/- 2.9 vs 16.1 +/- 1.8 litres, p<0.0001 and 0.40 +/- 0.06 vs 0.35 +/- 0.03, p<0.005 respectively). ICW was similar in both groups but the ICW to ECW ratio was significantly higher in the athletes compared to the recreational sportsmen (0.67 +/- 0.16 vs 0.54 +/- 0.07, p<0.01). These data suggest that assumptions regarding the chemical composition of the standard human body may not be valid in elite athletes
Curare con il ciboGli alimenti funzionali nella dietetica e nella dietoterapia
No full textL'obiettivo è quello di fornire un aggiornamento scientifico agli operatori sanitari sugli alimenti funzionali (naturali o formulati attraverso l'uso di tecnologie alimentari) che possono essere utilizzati ai fini della optimal diet sia in ambito dietetico che dietoterapico
Evaluation of body composition in athletes
No full textAbstract Some applications of indirect calorimetry to sportsmedicine are discussed and exemplified by case reports. Inparticular, it is suggested that oxigen consumption can beemployed to assess the effects of physical activity on fatfreetissues and that the respiratory quotient may offer someinsights into the food habits of athletes
Principi di valuazione dello stato nutrizionale
No full textmetodi di valutazione dello stato nutrizionale nell'uom
A role for bioipendace analisys (BIA)
No full textThe measurement of body components is central to the study of body composition in animals and humans. The principle underlying the use of bioimpedance analysis (BIA) for assessing body composition is the relationship between body composition and the water content of the body. Resistance and reactance, the two main determinants of impedance, respond differently at any given frequency to intra-cellular and extra-cellular fluids. Estimation of fat and fat free mass is discussed. Footpad Vs lying position in term of measurement approach as well as accuracy are presented.Using BIA we can measure water content of the body at population level and using specific and appropriate equations we will have the possibility of detecting subjects at risk of overweight and obesity
Valutazione antropometrica e biochimica dello stato di nutrizione: dalla teoria alla pratica
No full textnot availabl
- …
