Genetics play a huge role when building muscle. Everyone is different there are no two the same therefore how people’s muscles react to body building is also different. Some people are genetically gifted. Even if your not born with a genetically gifted body you might have muscles that respond quickly to lifting weights on the other hand your muscles might grow at a slower rate. But slow progress is better than no progress. So don’t compare how you look against other people. Only compare yourself to yourself and how far you have come in your own fitness journey. Just because your genetics don’t enable your muscles to grow at a rapid pace doesn’t mean you can’t change the shape of them at all. With hard work, consistency & progressive overload I promise you your muscle will grow eventually.
Getting your training on point & choosing the right exercises for you is also a contributing factor to muscle growth. Some people may feel their glutes working during squats others might feel it more so in there quads. In this case if your goal is to build your glutes don’t prioritise squats in your training plan. One size does not fit all. When you see a fitness influencer selling a workout plan that is not personalised to your body don’t expect to look that that influencer. The exercises that worked for them might not necessarily work for you. You have to find the right exercises for yourself through trial & error. Don’t be fooled by Instagram fitness influencers.
Lastly, nutrition! When growing muscle protein intake is hugely important, it’s what helps your muscle to grow & it repairs them. You should be eating 2g or protein per kg of body weight. Carbs are your friend when building muscle. You need carbs to provide energy to lift heavy weights. Carbs are protein sparing meaning that your body gets its energy from glycogen (which is in carbs) instead of breaking down muscle tissue for energy & carbs also replenish glycogen levels post training.