Perfecting Your Lift
Challenge yourself with weights that push you while maintaining perfect form. Recognizing when to increase weight is crucial; if you can easily perform the prescribed reps, it's time to add more. Avoid the temptation to muscle through those last few reps at the expense of form, as this can lead to improper mechanics and ineffective workouts.In this clip
From this podcast

Mind Pump Podcast
859: Directing Extra Calories to Muscle Gain Instead of Fat Gain, How to Know When to Add More...
Related Questions
If I did my first set of an exercise, finished all 12 reps, and felt like I had a few more before my form broke down, should I go up in weight or stay at the same weight for all sets?
How do you know when it's time to increase the weight you lift if you are focused on form?
How can I add weight for strength without ruining my form if my form is not great after the first few reps?