When it comes to building muscle after turning 40, finding the right balance between intensity and safety is key. Marcus Filly stresses the need for a strong stimulus for muscle growth, especially as we get older. However, it's important to incorporate techniques that reduce the risk of injury. As the creator of Functional Bodybuilding and a six-time CrossFit Games athlete, Filly has the experience to back up his advice on effective training for individuals over 40. Let's explore Filly's top five muscle-building exercises for this age group, focusing on working hard while staying safe to prevent injuries.