CrossFeat

The TRX is a device, produced by the Fitness Anywhere company, allowing a type of training called Suspension training. It consists of a strap, folded, with handles to its ends. To use it correctly, the device must simply be anchored to a fixed point (door, tree, beam, wall, roof rack... ). The handles are used equally to hang one's feet or hands.

The term Suspension training refers to a strength training method that uses a system of ropes and straps to allow users to work against their own body weight.

Suspension training is a form of resistance training which consists of using our body weight. This type of training includes a large variety of movements and exercises. The aim is to develop simultaneously strength, balance, flexibility and stability. Suspension training develops physical strength while using functional movements and dynamic positions. Suspension training is based for instance on the unsteady nature of the positions. The actual term Suspension training is a trademark of Fitness Anywhere (company that edits the TRX).

Source: Wikipedia