Oligonol is a newly cheefruit - derived polyphenol converted into a low-molecular-form, which has improved absorption and strong antioxidative activity. The aim of the current study was to investigate the effects of Oligonol supplementation on perceived subjective mood states in addition to oxidative stress in undergraduate athletes during 52 days of track-and-field training. This was a prospective single blind crossover study.The ratings of perceived exertion(RPE) responses were significantly(P 0.05) lower following Oligonol supplementation, suggesting that Oligonol intake caused the subjects to feel less fatigued during regular training.The results of our own questionnaire on fatigue and pain were as follows: Oligonol supplementation significantly (P 0.05) improved all the fatigue scores and tended to attenuate the feeling of three kinds of pains(muscular/anticularpain,lumbago,and menstrual pain),followed by a change fot the worse after the discontinuance of Oligonol intake. Unexpectedly, however, there were no definite changes in the Profile of Moods States (POMS) scores or oxidative stress markers (8-hydroxy-2'-deoxyguanosine and hexanoyllysine) in urine after Oligonol supplementation. The results obtained suggest that Oligonol supplementation in young athletes shows significant subjective positive effects particularly on the feeling of fatigue durin gregular track and- field training, possibly contributing to the maintenance of good conditioning.
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