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CURRENT ISSUETHE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

A Journal on Applied Physiology, Biomechanics, Preventive Medicine,
Sports Medicine and Traumatology, Sports Psychology

Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
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Frequency: Monthly

ISSN 0022-4707

Online ISSN 1827-1928

 

The Journal of Sports Medicine and Physical Fitness 1998 December;38(4):281-5

    ORIGINAL ARTICLES

Effects of ascor­bic ­acid and car­bo­hy­drate inges­tion on exer­cise ­induced oxi­da­tive ­stress

Vasankari T., Kujala U., Sarna S., Ahotupa M.

MCA ­Research Labor­a­to­ry and Paa­vo Nur­mi Cen­ter, Depart­ment of Phys­iol­o­gy, Uni­ver­sity of Tur­ku, Tur­ku;
Finn­ish ­Sports Insti­tute, ­Vierumäki, Unit for ­Sports and Exer­cise Med­i­cine, Insti­tute of Bio­med­i­cine and Depart­ment of Pub­lic ­Health, Uni­ver­sity of Hel­sin­ki, Helsinki, Fin­land

Back­ground. We stud­ied the ­effects of sup­ple­men­ta­tion of vita­min C and car­bo­hy­drate on ­acute exer­cise-­induced lip­id per­ox­i­da­tion.
Meth­ods. Experi­men­tal ­design: two ran­dom­ized con­trolled ­trials.
Par­tic­i­pants: 17 endu­rance ath­letes. Inter­ven­tions: in ­study I, ­nine ath­letes repeat­ed ­twice a 10.5-km max­i­mal run and ingest­ed in a ran­dom­ized sin­gle-­blind ­order ­either 2.0 g vita­min C or pla­ce­bo. In ­study II, ­eight ath­letes repeat­ed ­twice a 27-km max­i­mal run and ingest­ed in ran­dom­ly ­either 105 g car­bo­hy­drate or pla­ce­bo. ­Venous ­blood sam­ples ­were tak­en ­before the exer­cise, imme­di­ate­ly ­after the exer­cise, and ­after a recov­ery peri­od of 90 min (study I) or 120 min (­study II). Meas­ure: ser­um ­diene con­ju­ga­tion, lip­id per­ox­i­da­tion.
­Results. In ­study I, ­there was no dif­fer­ence in ser­um ­diene con­ju­ga­tion ­between the ­trials dur­ing exer­cise (pre- vs ­post-exer­cise). How­ev­er, dur­ing the recov­ery peri­od (­post-exer­cise vs recov­ery sam­ple) ser­um ­diene con­ju­ga­tion con­cen­tra­tion ­decreased by 11% in the vita­min C ­trial but not in pla­ce­bo (p=0.028). In ­study II, ­there was no dif­fer­ence ­between the car­bo­hy­drate and pla­ce­bo ­trials.
Con­clu­sions. Vita­min C and car­bo­hy­drate do not pre­vent exer­cise-­induced ­increase in oxi­da­tive ­stress, but vita­min C, ­being a ­potent aque­ous anti­ox­i­dant, ­seems to ­decrease the lev­els of ­diene con­ju­ga­tion dur­ing recov­ery ­after exer­cise. The clin­i­cal sig­nif­i­cance of ­this phe­nom­e­non ­needs fur­ther eval­u­a­tion.

language: English


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