Here is an interesting study that was conducted to assess the impact of pre-workout caffeine on strength levels…
It was found that caffeine has a more profound effect on strength and motor unit recruitment…
So the take home-message from this is that if you are preparing for a training session involving compound lifts caffeine may enhance your performance…
However if you are going in the gym to train ‘guns’ then that pre-workout caffeine probably isn’t going to do a lot for you as you will not be recruiting big muscle groups in your session.
Read the full article here guys >>> http://breakingmuscle.com/supplements/effects-of-caffeine-on-upper-and-lower-body-strength