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ULTIMO FASCICOLOTHE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

Rivista di Medicina, Traumatologia e Psicologia dello Sport


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Original articles  BODY COMPOSITION, SPORT NUTRITION AND SUPPLEMENTATION


The Journal of Sports Medicine and Physical Fitness 2002 Marzo;42(1):31-7

lingua: Inglese

A moderate carbohydrate and fat diet does not impair strength performance in moderately trained males

Van Zant R. S., Conway J. M. *, Seale J. L. *

From the Department of Physical Therapy University of Findlay, Findlay, Ohio, USA
*US Department of Agriculture, Agricultural Research Service Beltsville Human Nutrition Research Center Diet and Human Performance Laboratory Beltsville, Maryland, USA


PDF  ESTRATTI


Background. The pur­pose of ­this inves­ti­ga­tion was to ­study the ­effects of var­ied lev­els of die­tary car­bo­hy­drate and fat ­intake on exer­cise train­ing and ­high inten­sity exer­cise per­for­mance in mod­er­ate­ly ­strength ­trained, aero­bic ­trained and ­untrained ­males.
Methods. Subjects (6 ­strength ­trained, 6 aero­bi­cal­ly ­trained serv­ing as an ­active con­trol ­group, 6 sed­en­tary) con­sumed iso­en­er­get­ic ­diets con­sid­ered ­either ­high CHO/low fat (HC/LF: ­total ener­gy 62% CHO, 20% fat, 18% pro­tein) or mod­er­ate CHO and fat (MC/MF: ­total ener­gy 42% CHO, 40% fat, 18% pro­tein) in a ran­dom­ly ­assigned cross­over ­design. Each die­tary treat­ment was ­three ­weeks in ­length. Prior to the ­study and fol­low­ing ­each die­tary treat­ment, mus­cu­lar ­strength and endu­rance was deter­mined (iso­ki­net­ic ­knee exten­sion and flex­ion, stan­dard con­cen­tric ­free ­weight ­bench ­press).
Results. No dif­fer­enc­es as a ­result of the die­tary treat­ment ­were ­seen in iso­ki­net­ic ­peak ­torque, ­total ­work pro­duc­tion, sin­gle rep­e­ti­tion max­i­mum (1 RM) ­bench ­press, or num­ber of ­bench ­press rep­e­ti­tions at 80% 1 RM. Self-report­ed exer­cise log ­data ­showed no die­tary ­effect on the ­subject’s abil­ity to main­tain train­ing lev­el.
Conclusions. These find­ings indi­cate ­that var­y­ing die­tary mac­ro­nu­tri­ent con­tent (HC/LF or MC/MF) had no ­effect on exer­cise train­ing or ­stength exer­cise per­for­mance in mod­er­ate­ly ­trained (aero­bic and ­strength) or sed­en­tary ­males.

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