Outcome
    Moderate Evidence

    Creatine Monohydrate for Oxygen Utilization Improvement

    Creatine improves repeated high-intensity work capacity, but does not raise VO2max and adds water weight that can slow endurance events.

    Overview

    Creatine improves repeated high-intensity work capacity, but does not raise VO2max and adds water weight that can slow endurance events.

    Verdict

    Mixed evidence

    How It Works

    Phosphocreatine regenerates ATP anaerobically, benefiting short bursts rather than sustained oxidative metabolism.

    Dosing & Protocol

    Typical dose

    Recommended dose
    3-5 g/day (studied at 20 g/day loading then 5 g/day); evidence for VO2max/oxygen utilisation is mixed
    Expected timeframe
    2-4 weeks if a benefit appears at all; steady-state VO2max often unchanged

    Protocol

    dose
    3-5 g/day maintenance (trials used 20 g/day x 5 days then 5 g/day)
    form
    Creatine monohydrate
    steps
    Understand the evidence first: creatine reliably improves repeated-sprint and high-intensity interval work, but trials of steady-state VO2max are mixed and many show no change,If your sport is interval-based, dose 3-5 g/day alongside training,Do not expect improved steady-state aerobic economy — the added body water and weight can slightly worsen running economy,Re-test with a repeatable field test (e.g. repeated 30 s efforts) rather than relying on feel
    timing
    Daily, with a meal
    duration
    4-8 weeks in the endurance trials

    Evidence

    What the studies say

    The evidence for creatine in strength and repeated-sprint work is among the strongest in sports nutrition. Endurance trials show neutral or slightly negative outcomes due to 1-2kg of water retention.

    No studies are yet linked to both Creatine Monohydrate and Oxygen Utilization Improvement.

    Safety

    Caveats

    Mixed evidence. Endurance athletes in weight-sensitive events may find the 1-2 kg water weight a net negative. Raises serum creatinine on labs without kidney injury.

    Less likely to help if

    Pure endurance athletes with high habitual meat intake and already-saturated stores; those in weight-limited or uphill events.

    Medical Disclaimer

    The information provided on this website is for educational and informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or before starting any supplement regimen.

    Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.