The round roller Hollow (12126) of the company X-FIT is a self-massage and self-regulation tool that can be used for warm-up or rehabilitation in sports activities, as well as for physiotherapy purposes. It is an ideal tool for people of all fitness levels who want to achieve the following:

- Relieve pain in tired muscles.
- Increase blood flow and accelerate muscle recovery after training.
- Tone muscles before exercise.
- Increase range of motion by assisting muscle flexibility.

It can be used by placing it on the wall or floor and in any sports space as it can be easily transported. The process usually starts with a feeling of pain but ends with gradual application to bring the corresponding endurance and remove it.