The objective of this study is to examine muscle activation during the forward lunge in adult exercisers. This project seeks to determine which combination of trunk and lower leg angles maximizes muscle activation during a forward lunge exercise. Knowing this information will help inform practitioners’ decisions on which type of exercise is best for lower extremity strengthening. The central hypothesis is the trunk lean lunge will have greater muscle activity in the gluteus maximus, vastus lateralis, biceps femoris and gluteus medius when the trunk and shank angle are altered. The rationale for this research is to inform future guidelines regarding how to maximize the effects of the forward lunge exercise while minimizing discomfort and risk of injury.