The dynamic rope is an app composed of 3 pulleys having handles as terminals. As a cable 3 elastic bands of different consistency and resistance are applied. The elastics are progressive resistances: the increase in tension is directly proportional to the increase in the elongation of the elastic. Fitness elastic bands can be used in many sports: yoga, pilates, crossfit, functional training, as a support for stretching or in fitness. They are useful in heating and can help improve elasticity and intensify the strengthening of a single muscle. Finally, fitness elastic bands are widely used in corrective and postural gymnastics because they help prevent injuries but also in rehabilitation. They are used a lot in case of tendinitis or inflammation because the technique is progressive, allowing an adaptation of the resistance according to the lengthening.