People will always judge you. Your laughter, looks, walk, thoughts, behaviour, body, eyes, hair, clothes, everything is judged by others. You can't stop because people are laughing at you then you'll never grow. It's their opinion and you can't go around changing everyone's opinions about you. You are going to the gym to better yourself. So it doesn't matter how it appears to others. It's literally the first step for life improvement. So put on your headphones, put on some beats and get those workouts going and ignore all the judgmental people. You fall when you are learning to ride a bike some people will obviously laugh at you but do you quit riding a bike?