Is it wise to have a drink right after you workout? How could it impact your results? Alcohol could affect you—and your workouts—in unexpected ways. After cardio, alcohol could impact your body’s store of glycogen, the primary fuel for working out at higher intensities, causing you to feel fatigued faster during your next workout. Drinking after resistance training could reduce protein synthesis, the process that’s needed for your muscles to rebuild and grow stronger, So you might be slightly sabotaging your strength-building and toning.