How many hammer curls should I do to effectively target the brachialis muscle while ensuring proper form and preventing injury? Is there an optimal number of repetitions that align with my fitness goals, whether I am aiming for muscle hypertrophy, endurance, or strength? Furthermore, should I consider my current physical condition and previous workout regimen when determining the ideal volume of sets and reps? Additionally, how often should these distinct movements be integrated into my routine to cultivate balanced arm development? Are there specific guidelines for beginners versus experienced lifters that should be taken into account? Is it advantageous to incorporate variation in weight or tempo to stimulate muscle growth and adaptation? Ultimately, how can I assess my progress and adjust my training accordingly to achieve the best results without overexerting myself? What indicators should I watch for to ensure that I am on the right path?