Types of Pre-Workout
Pre-workouts can be divided into two groups:
☞Those with stimulants
They act as CNS stimulants and help improve mental focus. The stimulants pretty much always include caffeine, in widely varying doses, but may include other stimulants including yohimbine, theacrine , guarana, and many others
☞Those without stimulants
Many supplement companies have developed stimulant-free pre-workouts for those who are sensitive to caffeine, simply don't want it, or who exercise close to bedtime.
The main purpose of pre-workouts is to give you the energy, endurance, and focus to perform the exercises that can help you can reach of goal.