He stops by the gym’s café for a cup of coffee before heading to the treadmill. Or, she walks into the gym with her favorite Starbucks coffee before busting it out in a high energy Zumba class. It would not surprise me if you have come across something similar. You know, someone who chugs down a quick drink of coffee? Be slow to criticize, though. While I am not here to wholly advocate caffeine, research has shown that drinking a cup of coffee before a workout can improve performance, offer some functional advantages, and may even help with weight loss.