Use the Talk Test: During weight lifting, you should be able to maintain a conversation. If you're struggling to speak or gasping for breath, the weight is too heavy. Choose a lighter weight that allows you to perform the exercises with proper form and controlled movements.
Choose a Weight That Fatigues Your Muscles: The weight you select should challenge your muscles without compromising your form. Aim for a weight that allows you to complete the desired number of repetitions with moderate difficulty. If you can easily perform the set, consider increasing the weight.