Amino Acids, Peptides, and Proteins: News and Research on Endorphins

MeSH tree: D12.776.631.650.575.241

What causes the runner's high?

It can set in after just a few miles: Nagging aches grow numb, sense of time slips away, colors brighten and thoughts grow crisp. Afterward, runners say they feel less anxious, stronger and more confident—even euphoric.

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