Is pre­race caf­feine a wee prob­lem?

Runner's World (UK) - - Warm Ups -

Caf­feine can have a small di­uretic ef­fect, but ex­er­cise negates this and ben­e­fits en­durance per­for­mance, says di­eti­tian Dr Karen Reid (per­for­mance­food. Re­sponses vary and one study found women were slightly more sus­cep­ti­ble to a di­uretic ef­fect than men, adds Reid.

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