PreWorkout supplements have the nutrition to enable you to push your training sessions harder for longer. A common misconception is that preworkouts are purely just about increasing energy levels through stimulant ingredients like caffeine. This is really missing the purpose of preworkout supplements. While it is true that some preworkouts contain ingredients to increase energy levels, it is never the basis of a preworkout product, in fact some preworkout supplements contain zero stimulant ingredients. The basis of all preworkout products are nutrients that enhance performance by increasing blood flow, reducing lactic acid build up and increasing the natural function of key chemical processes within the body that improve performance, like ATP production. The energy component of preworkout products is really a secondardy function and this is where you will find the difference is between preworkout brands.
Zero Stimulant: These preworkouts rely 100% on improving performance through key amino acids without the use of any stimulant ingredients.
Medium Stimulant: These preworkouts typically come in larger tubs and as far as stimulants go they will usually have a bit of caffeine.
High Stimulant: These preworkouts typically come in the smaller tubs and contain only the key amino acids for improving performance but place more emphasis on various different plant extracts that affect your central nervous system causing greatly increased energy levels.