Home > Riviste > The Journal of Sports Medicine and Physical Fitness > Fascicoli precedenti > The Journal of Sports Medicine and Physical Fitness 2004 March;44(1) > The Journal of Sports Medicine and Physical Fitness 2004 March;44(1):44-8

ULTIMO FASCICOLO
 

JOURNAL TOOLS

eTOC
Per abbonarsi
Sottometti un articolo
Segnala alla tua biblioteca
 

ARTICLE TOOLS

Estratti
Permessi

 

Original articles  BODY COMPOSITION, SPORT NUTRITION AND SUPPLEMENT (ERGOGENICS) 

The Journal of Sports Medicine and Physical Fitness 2004 March;44(1):44-8

Copyright © 2009 EDIZIONI MINERVA MEDICA

lingua: Inglese

Postexercise increase of free fatty acids. A qualitative indicator for free fatty acid utilisation during exercise?

Vobejda C. 1, Simon G. 2, Zimmermann E. 1

1 Sportmedizin, University Bielefeld, Bielefeld, Germany 2 Sportmedizin Institut, Sportschule der Bundeswehr Warendorf, Germany


PDF


Aim. The pur­pose of ­this ­study was to ­verify the hypoth­esis ­that the ­postexer­cise ­increase (PEI) of ­plasma ­free ­fatty ­acid (FFA) con­cen­tra­tions ­after ces­sa­tion of exer­cise is a suit­able qual­ita­tive indi­cator for the FFA util­isa­tion ­during the fore­going exer­cise.
­Methods. Four­teen, 17 and 23 ­healthy sub­jects par­tic­i­pated in 3 ­test ­series per­forming sev­eral pro­longed exer­cise pro­to­cols (PEP) on a ­bicycle ergom­eter. ­During and ­after ces­sa­tion of the PEP ­heart fre­quency, lac­tate and FFA ­were meas­ured.
­Results. ­Fasting ­resulted in an ­increase of PEI (90%, p<0.05) and the syn­er­gistic use of ­upper ­body mus­cles ­during ­cycling ­caused a sig­nif­i­cant ­rise of PEI com­pared to “reg­ular” ­cycling (39%, p<0.01). ­Increasing work­load ­step by ­step pro­duced con­tin­u­ously ­rising PEI (p<0.05), ­only ­from 42% to 50% of max­imal work­load PEI ­decreased by 17% (p=n.s.).
Con­clu­sion. The ­results sup­port the hypoth­esis ­that PEI is a suit­able qual­ita­tive indi­cator for FFA util­isa­tion ­during a fore­going exer­cise. Fur­ther­more the ­results indi­cate ­that ­there is a max­imum of FFA util­isa­tion in the ­legs at 40% of max­imum work­load ­during ­cycling and ­that the ­upper ­body mus­cles con­tribute sub­stan­tially to ­total ­body FFA turn­over at ­high ­inten-­sities, an ­aspect to ­which pos­sibly too ­little atten­tion has ­been ­paid to ­when quan­ti­fying FFA turn­over ­during ­cycling.

inizio pagina