My personal judgment is that one is March-June. I have been a fitness instructor for 8 years. Push-ups have a strong stimulating effect on human chest muscles, upper limbs, shoulders and abdominal muscles, and are definitely a good physical exercise program. Besides, I'm glad to see your attention to sports science. Give you a plan: divide the push-ups into four groups, each with an interval of 15 and each group with an interval of 1 minute. Slow down, slow down, and keep your muscles in a state of tension forever. If you can continue to do it after doing as I ask, please increase each group to 20 times, but don't be sad to increase the number of groups. It is suggested that when doing push-ups, try to put your hands in different positions on both sides of your body, and you will feel that your different unknown muscles are stressed and burning.