Girls who go to the gym for the first time should understand that they should stretch first and remember to do various exercises with their muscles. If they don't stretch their muscles, it is easy to cause all kinds of discomfort in each joint or leg. If you want to practice fitness equipment, you must do it under the guidance of a professional coach, otherwise some movements will not have adverse effects on your body. Stretch after all kinds of equipment or exercises, or your body will be sore the next day.