Ergogenic aids are substances or devices that enhance energy production, use or recovery and provide athletes with a competitive advantage. 

LEGAL & EFFECTIVE ERGOGENIC AIDS

There are many sports nutrition supplements that have evidence-backed ergogenic effects. They are considered safe for healthy adult athletes and people who like to workout.                                                                           Some examples:

• Electrolytes
• Creatine supplements
• Caffeine (anhydrous)
• Essential amino acids (EAAs) and branched-chain amino acids (BCAAs)
• Beta-alanine
• L-citrulline (malate)
• Carbohydrate powder
• Whey protein powder

Placebo effect: is a positive effect that cannot be attributed to the properties of the placebo itself but must be due simply to the person's belief that the placebo works 

 ILLEGAL ERGOGENIC AIDS