Buying guide: what to know before buying an abdominal machine online The main benefit of abdominal machines is precisely their specialty. As they are machines designed exclusively to work the middle area of the body, all the user's efforts are focused only on that area, on the abdominals, lumbars or hips, achieving a higher intensity work on these muscles and better results. What types of abdominal machines are there? Although the decision of whether or not to purchase an abdominal machine depends mainly on the need or desire to work the muscles of the abdominal area, there are some variables among the models you should take into account: According to their resistance According to its use According to their resistance As with other types of bodybuilding equipment, the resistance on abdominal machines can be exerted by means of selectable plates or by loading discs. In resistance machines with plates, the plates are easily selected without the need to do it manually. On disc-loaded resistance machines, however, they must be entered manually to vary the weight. According to its use All machines, in addition to having a limit on their load capacity and maximum weight that must always be respected, also have a limit on their intensity of use. This means that, depending on the intensity of use, the warranty varies and there are three types: domestic, semi-professional and professional.