By far dumbbells and barbells are the most popular type of free weight equipment.They can be used to train several areas of the body, such as arms, back, shoulders, chest, legs etc.

• 到目前为止，哑铃和杠铃是最受欢迎的负重器械，它们可以用来锻炼身体上的多个部位，如手臂、背部、肩部、胸部和腿部等。