Citrulline when supplemented increases the use of amino acids during exercise, increases arginine for nitric oxide production, enhances anaerobic performance, reduces muscle soreness, increases nitrogen balance, reduces fatigue and increases aerobic energy *. (muscle-elements.com)
For context, it said that while «ergogenic effects of caffeine on aerobic or endurance exercise are well documented,» its impact on «high - intensity, primarily anaerobic performance, was not well understood.» (businessinsider.com)
What's more, a recent study reported that athletes were able to make improvements in both aerobic and anaerobic performance during Ramadan, probably because training intensity and daily energy and fluid intake were not compromised by their fasting ritual. (bembu.com)