Tips to strengthen weak muscles

 Rely on isolation exercises:

We cannot deny the importance of compound exercises in building strength and size, but if you want to strengthen the weak muscles in your body, it is preferable to use isolation exercises instead of compound.
This is simply because when you exercise your weak muscles using a combined exercise such as the bench press “Assuming that your chest muscles are weak” compared to the shoulder muscles or triceps, most of the load will shift to the shoulder and triceps instead of the chest; Hence, the chest will not benefit as well as it should from the exercise. Therefore, isolation exercises must be included to force the weak muscles to do most of the work.

Exercise with a full range of motion:

Range of motion is the distance between a muscle's complete extension and the end point at which the muscle is fully contracted.
To properly train a muscle, you need to work it through a full range of motion.
In some exercises, parts of the movement are weaker, "for example the last 3 inches in biceps exercises."
Therefore, it is best to use a weight that fits the weakest part of your range of motion to ensure that you perform the exercise with the same strength throughout the entire range of motion rather than performing the exercise incorrectly.
Improve your weight control (this point is related to the previous one):
In order for your muscles to grow, you need to stimulate the largest amount of muscle and lead to muscle fatigue. Therefore, you must be in control of the weight from the moment you move the joint until the maximum correct range of motion.
This means using less weight, this may conflict with your need to appear stronger, but remember well the reason for being in the gym is to change your body and not to persuade people.

The connection between mind and muscle:

If you focus on a muscle and think about it well before exercise, it will be easy for the body to recruit that muscle to work on lifting loads.
So try not to lose your focus while exercising by getting busy with music or your phone (maintaining your focus will help you strengthen weak muscles faster than you expect).
And remember, "What seems difficult to you now, will soon be part of the warm-up."