First of all, if you want to gain muscle, you need anaerobic exercise, that is, strength training, such as push-ups, plate support, dumbbells and so on.

Aerobic exercise is mainly used to eliminate fat.

Therefore, in order to achieve the effect of muscle gain, it is suggested that besides running for aerobic exercise every day, you should also do some anaerobic exercise every day. Specific can Baidu, there is a systematic video.

Remember to supplement a certain amount of protein and drink 100g yogurt after exercise.

I hope I can give you a general idea.