9. Caffeine
The importance of caffeine in enhancing performance is invaluable. It has been proven to boost focus, raise testosterone, enhance motivation, and increase physical capacity when you are worn out. Recent research discovered that fatigued athletes who used caffeine before training chose weightier loads and did more reps than on a normal day. American research showed that consuming 8mg of caffeine in-between sessions on a double training day increased participants’ level of performance during the second session than other participants who only had a carb-based drink.
