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Nutritional status and physical working capacity

R Buzina, Z Grgić, M Jusić

    Human Nutrition. Clinical Nutrition
    |January 1, 1982
    PubMed
    Summary
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    This study found that vitamin deficiencies were common in schoolchildren. Supplementation improved VO2max, suggesting a link between nutrient status and physical performance.

    Area of Science:

    • Nutrition Science
    • Sports Medicine
    • Pediatric Health

    Background:

    • Biochemical deficiencies in vitamin C, riboflavin, and pyridoxine were prevalent in 12-15-year-old schoolchildren.
    • A correlation was observed between maximal oxygen uptake (VO2max) and vitamin C, riboflavin, vitamin A, and iron status.

    Purpose of the Study:

    • To investigate the impact of vitamin supplementation on VO2max and nutrient status in schoolchildren.
    • To determine the relationship between improved nutrient levels and physical performance.

    Main Methods:

    • A cohort of schoolchildren aged 12-15 years with identified vitamin deficiencies.
    • Intervention group received daily supplementation of ascorbic acid, riboflavin, and pyridoxine.
    • Control group received no supplementation.

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  • VO2max, plasma vitamin C, erythrocyte riboflavin, and hemoglobin levels were measured.

    • Main Results:

    • Supplementation significantly reduced the prevalence of vitamin deficiencies.
    • A statistically significant increase in VO2max was observed in the supplemented group compared to controls.
    • Pooled analysis revealed that increased VO2max correlated with higher plasma vitamin C, erythrocyte riboflavin, and hemoglobin levels.

    Conclusions:

    • Vitamin supplementation can improve VO2max in schoolchildren with deficiencies.
    • The observed improvement in VO2max may be due to direct correction of vitamin deficiencies or improved iron metabolism.
    • Further research is needed to elucidate the precise mechanism linking vitamin status and physical performance.