Question 1: Practice for 2 days, take a day off, and practice at this frequency; It is normal to feel pain for four or five days for the first time. In fact, it will hurt if you exercise a lot in the future, but you were used to that feeling at that time;

Question 2: strenuous exercise, at least 3-4 hours after meals; The average amount of exercise is 1- 1.5 hours later. And you should do stretching exercise for about 15 minutes before exercise to prevent sports injury, and also do stretching exercise for more than 5 minutes after exercise to relieve muscles and prevent muscle pain the next day.

Question ③

Sit-ups: mainly exercise the upper abdomen, middle abdomen and lower abdomen, divided into many actions;

Push-ups: There are also several movements, mainly to exercise the thigh, triceps, biceps and deltoid muscles of the chest muscles.

Practice dumbbells: there are many kinds of movements, mainly to practice the muscles of the upper body;