There are five kinds of push-ups, each with three groups, one group 10~ 15 rest interval, each group 1.5 minutes, 3 minutes.
The first type: the arms are shoulder width apart.
The second type: the arm is slightly narrower than the shoulder width, the palm is slightly inward, and the legs are close together.
The third type: the arms are slightly wider than the shoulders, the palms are slightly outward, and the legs are close together.
The fourth type: commonly known as chest push-ups, refers to the arms clamped on both sides of the chest.
Fifth: crocodile push-ups, the landlord can watch videos online.
Doing this well at the same time can take care of your upper and lower pectoral muscles, and there will be no case where the lower pectoral muscles are developed and the upper pectoral muscles are dry. At the same time, it will also exercise your back and arm muscles
As long as you persist every day, it is no problem to break through 50 in about 2 months.
Also, you must do it slowly, not quickly, because by inertia, you can't get a good exercise for your arm muscles.
The above is purely by hand, I hope it will help the landlord.