If I have 1000 push-ups, will my chest muscles become very very big? [trigger15sec]

High repetition training stimulates slow muscles, slow muscles do not grow much. So if you want to develop effective muscles, you should stimulate the white muscles (fast muscles) with a weight that can be 6-12 times (6-12RM) when you do your best at once. And when the weight is adjusted, you have to increase the weight continuously. Then the muscle will grow in proportion to the weight that can be 6-12 times (6-12RM).