An ergogenic aid is something that helps improve our physical performance or increase our energy levels. It could be a supplement, a device, or a technique that boosts our athletic abilities. Full definition
Many of the foods you have access to can be used as ergogenic aids. (blog.nasm.org)
The review concluded that overall caffeine ingestion can be an effective ergogenic aid for endurance athletes when consumed in moderate quantities (3 - 6 mg / kg body weight), before and / or during exercise3. (coffeeandhealth.org)
Caffeine is a well - documented ergogenic aid in performance research, and its use in sports dates all the way back to the 1920s. (bodybuilding.com)