high antioxidant foods / Trained athletes

[Doe]

Asia Pac J Clin Nutr. 2003;12 Suppl:S9. Links

Antioxidant restricted diet increases oxidative stress during
acute exhaustive exercise.

Watson TA, Callister R, Taylor R, Sibbritt D, MacDonald-Wicks
LK, Garg ML.

Nutrition and Dietetics, University of Newcastle, NSW 2308.

Background - Foods high in antioxidants are considered to
play a major role in defending the body against oxidative
stress during exercise. Objective - To investigate the
effects of short-term restriction of high-antioxidant foods
on oxidative stress markers and antioxidant defences during
acute exercise. Design
- Antioxidant rich foods were restricted in 17 athletes
exercised to exhaustion and blood antioxidant and oxidative
stress markers were examined. Participants followed habitual
diets high in antioxidants prior to an initial exercise test
and then followed a two-week restricted-antioxidant (R-AO)
diet before a second exercise test. During both exercise
tests blood samples were taken pre-exercise, post
sub-maximal exercise, post exhaustion and with one hour
recovery. Outcomes - The R-AO diet reduced antioxidant
intake 3-fold when compared to habitual-antioxidant (H-AO)
intakes. F2-isoprostanes (oxidative stress marker) was
significantly increased following sub-maximal exercise
(38%), exhaustive exercise (45%) and one hour recovery (31%)
on the R-AO diet compared to the H-AO diet. F2-isoprostanes
during exercise when following the H-AO diet remained
relative unchanged from rest. Total antioxidant capacity and
circulating anti-oxidants were not significantly affected by
the R-AO diet, but tended to be lower. Exercise performance
was not affected by the R-AO diet. Conclusions - Trained
athletes may require higher intakes of exogenous
antioxidants to defend against increased oxidative stress
during exercise, which can be met through a diet rich in
high antioxidant foods.

PMID: 15023594 [PubMed - in process]

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http://pages.ivillage.com/ironjustice/manisaherbivore DEAD
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[markd]

Meat was no doubt a standard part of their diet every day and
iron anemia was no doubt not an issue so the external intake
of antioxidants would seem to help. I hope Tom you don't mind
if someone tries to tie this abstract into a larger discussion
to save it from being but another factoid.

>Asia Pac J Clin Nutr. 2003;12 Suppl:S9. Links
>
>
>Antioxidant restricted diet increases oxidative stress during
>acute exhaustive exercise.
>
>Watson TA, Callister R, Taylor R, Sibbritt D, MacDonald-Wicks
>LK, Garg ML.
>
>Nutrition and Dietetics, University of Newcastle, NSW 2308.
>
>Background - Foods high in antioxidants are considered to
>play a major role in defending the body against oxidative
>stress during exercise. Objective - To investigate the
>effects of short-term restriction of high-antioxidant foods
>on oxidative stress markers and antioxidant defences during
>acute exercise. Design
>- Antioxidant rich foods were restricted in 17 athletes
> exercised to exhaustion and blood antioxidant and
> oxidative stress markers were examined. Participants
> followed habitual diets high in antioxidants prior to an
> initial exercise test and then followed a two-week
> restricted-antioxidant (R-AO) diet before a second
> exercise test. During both exercise tests blood samples
> were taken pre-exercise, post sub-maximal exercise, post
> exhaustion and with one hour recovery. Outcomes - The
> R-AO diet reduced antioxidant intake 3-fold when compared
> to habitual-antioxidant (H-AO) intakes. F2-isoprostanes
> (oxidative stress marker) was significantly increased
> following sub-maximal exercise (38%), exhaustive exercise
> (45%) and one hour recovery (31%) on the R-AO diet
> compared to the H-AO diet. F2-isoprostanes during
> exercise when following the H-AO diet remained relative
> unchanged from rest. Total antioxidant capacity and
> circulating anti-oxidants were not significantly affected
> by the R-AO diet, but tended to be lower. Exercise
> performance was not affected by the R-AO diet.
> Conclusions - Trained athletes may require higher intakes
> of exogenous antioxidants to defend against increased
> oxidative stress during exercise, which can be met
> through a diet rich in high antioxidant foods.
>
>PMID: 15023594 [PubMed - in process]
>
>-------------------------------------------------------------
>--------------
>------
>
>Who loves ya. Tom Jesus Was A Vegetarian!
>http://jesuswasavegetarian.7h.com Man Is A Herbivore!
>http://pages.ivillage.com/ironjustice/manisaherbivore DEAD
>PEOPLE WALKING
>http://pages.ivillage.com/ironjustice/deadpeoplewalking