Including strength training in a fitness regime is essential for several reasons. It helps build and maintain muscle mass, which is crucial for overall strength and functional performance. Strength training also plays a significant role in improving metabolic rate, aiding in weight management and fat loss. Furthermore, it contributes to bone health by increasing bone density, reducing the risk of osteoporosis. Additionally, strength training enhances joint stability, balance, and posture, ultimately helping individuals perform daily activities more efficiently and reducing the risk of injury.