If you give 100 pus ups every day, there is no problem, but you should give it once a day. If you give 20 bookdowns once a day is enough. Push-ups basically strengthen , but just one exercise will not rebuild your body if you are overweight. "If your goal is to make your body look good and tone up , then nutrition is the most important thing." Lose some weight by eating healthy food along with physical activity , then you will be fascinated to see yourself in the mirror. And there will be no problem of getting taller or body weight, but if you give several times a day, chest pain , arm pain , but if you give it regularly and if it becomes a habit, then there will be no problem later, InshaAllah.