Primary fitness should not be too intense. If there is no fitness foundation, you can do push-ups, sit-ups and squats, which are often used to exercise muscles.

Muscle growth is made by tearing muscle fibers and then repairing them. Because the entry time of fitness is short, so don't worry, you can do it in groups with fewer times. For example, people with a certain fitness foundation do wide and narrow push-ups, in groups of 50, in groups of three to four, while junior fitness enthusiasts can choose 30 groups and do exercises in groups of four to five, and the effect is also good.

Generally speaking, fitness is a long-term activity, and it is impossible to gain muscle quickly or become stronger at once in a short time. If you achieve a certain effect with your bare hands, you can use equipment to keep fit.