Pre-workout supplements include a very wide range of products with a main goal to increase workout performance and efficiency as well as to increase athletic skills. A training without the necessary intensity will not produce results and will therefore be a waste of time and effort. Conversely, a high-intensity workout boosts strength and muscle growth. A workout reaching 100% of the maximum effort can bring significant changes within a short period of time. Pre-workout supplements improve the quality of your workout, which is what you are actually looking for.