Here are 7 rules that you should follow for building muscles faster.
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Mind and muscles connection is esential while performing exercises
When your body says that's it always do one more rep after that
If you're serious about building aesthetic physique then be consistent in the gym.
Always try to increase weight/reps you've performed last time of same exercise.
Always give priority to compound movements they are most effective for muscle building.
Add more protein rich food in your diet.
Rest is also necessary, take 7-8 hours of sleep everyday.