With all the workout plans and diet programs out there, it can be hard to know where to start to achieve your dream body. While people want to get in shape for different reasons, it is safe to say that one of those can be to build muscle. Fulfilling the goal of muscle gain can be done in many ways; however, when it comes to popular workout trends, high-intensity interval training (HIIT) is the big rave of working out. However, does HIIT really help you build muscle?