ive spoken to a few guys who have been using Optygen for some time with great results. they continue to use it all through the race season.
I started using Sportlegs last year with great results as well. mostly helps with quad pain/cramping and recovery soreness.
i'm interesting in trying Optygen to help smooth my breathing, but i dont know if it will negatively affect me if i take it with Sportlegs.
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