I know that after some time, one has to change programs to avoid hitting plateau. But how do we know if we've already hit plateau or we just have to give our program more time to work?
The plateau will largely depend on your goals are you bodybuilding or strength training...
If you're bodybuilding monitor your weight and your BF%. If your bulking you're looking to gain more weight ideal (without any AS) you're looking at around 1ibs a week (max of 2ibs a week). If you're not gaining weight you need to adjust your calorie intake eat more and eat clean. If you're cutting you're looking to lose around 1ibs a week if you are following a specific diet and you stop losing weight either train more (burn more calories a day), eat less or do a little bit of both.