Comparison TREX TX-150B vs TREX TX-110B

The maximum weight of the user for which the equipment is designed. Usually, only the weight of a person’s body is meant here, without taking into account the barbell, dumbbells or other weights that he holds during the training. However, manufacturers take into account that athletes often use various weights (the weight of which is often comparable to the weight of the athlete himself), and put an appropriate margin of safety into the design. So this parameter is rather arbitrary and is not a strict limitation: in fact, this is the maximum weight of the athlete, at which the structure is guaranteed not to break when working with any additional weight (within reason). If the weight is relatively small, the excess weight of the athlete is also quite acceptable. For example, a bench with a limit of 100 kg or less is unlikely to break under a user weighing 120 kg with 5 kg dumbbells.

It is worth paying attention to the maximum user weight when choosing if the machine is purchased for public use, or for professional athletes working with heavy weights. Here we note that the above-mentioned restriction to 100 kg is quite modest; 100 – 120 kg — also not an outstanding indicator; models for 120 – 150 kg are quite popular; and the most durable and reliable equipment have a weight limit of more than 150 kg.

Apparatus for strength exercises that create a load because the athlete must stretch an elastic cord or spring. In power benches and racks, expanders are usually made in pairs, under both hands at once. The range of exercises available with such apparatus is quite extensive. However, the disadvantage of expanders is that they cannot be adjusted according to the load. Therefore, as equipment for benches and racks, they are quite rare.

The ability to adjust the stops installed on the bench. This can be a leg rest in an abs bench, an armrest in a Scott bench, a hip support in hyperextension constructions (see "Product type"), etc. Accordingly, the adjustment options may vary: for example, supports for the hips are regulated only in height, and for the legs — often also in the thickness of the leg. Anyway, this feature allows you to adjust the working dimensions of the machine to the physique of the athlete, which is important not only for convenience but also for the safety of training.

The ability to adjust the seat of the machine at the request of the athlete.

Note that in this case we are talking only directly about the "seat". As for the possibilities, the seat adjustment allows you to adjust it at least in height — this allows you to choose the optimal position, taking into account the height of the user.

The dimensions of the equipment in the assembled and ready-to-work state. It is important to note that more space is needed for the comfortable and proper operation of the machine. This is due to the need to have space for the person himself, the removal of arms and legs when performing exercises and using additional equipment. If we are talking about a gym, then people working nearby or placed equipment, etc., can become an obstacle. Therefore, it is recommended when choosing to calculate that in addition to the dimensions of the machine, you may need an additional metre of free space on each side.