It provides an 82% energy return
The new R.4000 REACTIVE midsole provides the highest energy return compared to any other Joma shoe and converts the impact of your step into energy for the next one. It provides an 82% energy return which makes you feel the propulsion.
How does R4000 REACTIVE work?
R4000 REACTIVE provides you the 82% of the energy you would need for each step, you only need to contribute with an 18%. With every step you do, the midsole begins to regain its shape quickly, this technology is called reactivity. It converts the energy of your steps making you save effort.
How would you feel the R4000 REACTIVE help?
You will feel the sensation of impulse that will help your muscles reduce fatigue. The less muscle fatigue, the higher your running performance will be, it will also help to increase your speed. R4000 REACTIVE will help you to improve your race pace and have a better recovery after every race.
Who says this?
Joma doesn't say it. This is proved by a study carried out by the INESCOP Innovation and Technology Center that verifies the rebound resilience certified by the UNE-ISO 4662: 2013 standard.