I came across this article after thinking about protein intake and fatigue. It’s a bit of an assumption that working out needs protein supplements but that may be too broad a brush to cover this topic. Certainly for some it’s the right thing. This article gives some good detail and is an easy read so worth a look if you are thinking or maybe not thinking of adding protein to your diet, or indeed if you already do!
Runners need protein to improve recovery (and heal) after we run, but how do we know if we need enough or need a protein shake? We answer your questions.
— Read on runnersconnect.net/protein-for-runners/