Conclusions
This is the first study to explore the effects of co-ingestion of caffeine (5 mg/kg) and CitMal (12 g) compared to either supplement in isolation or placebo. We found that the ingestion of caffeine alone or combined with CitMal improved maximal strength and muscular endurance, but there were no additive effects of combining these supplements. There was no significant difference between the conditions for CMJ-derived variables. CitMal provided in isolation was not ergogenic for any of the analyzed outcomes. In summary, caffeine ingestion appears to be ergogenic for muscular strength and muscular endurance, while adding CitMal does not seem to further enhance these effects.