A2: Like all sports supplements, pre-workout supplements have their pros and cons. Whether pre-workout supplements are right for you will depend upon your individual goals and needs. Advantages of pre-workout supplements include: • Pre-workout supplements include a combination of ingredients that give you the energy boost you need to get through intense training. • Pre-workout supplements reduce muscle breakdown and fatigue. • Pre-workout supplements allow you to train harder and longer, which allows for greater muscle gains. Disadvantages of pre-workout supplements include: • Pre-workout supplements contain caffeine and other energy boosting ingredients that may make you jittery. • Pre-workout supplements may have side effects like stomach upset, headaches, and trouble sleeping.