Time and frequency of doing push-ups

Correct. Push-ups mainly train pectoralis major, deltoid, triceps brachii and trapezius. It also has a certain strengthening effect on intercostal muscles and abdominal muscles.

Generally speaking, according to the individual's physique, the number of times and groups is different. Individuals recommend each group 10-50 times, and 3-8 groups are appropriate. Beginners can do 3- 10 times in each group, and according to their own ability, they can't do it any more.