Recommendations for sky diving/parachute diving: Some activities with high impact risk like sky diving, fun park rides, bungee jumping etc. apply a certain amount of acceleration or pressure to the recipient's head. The acceleration to the implant itself is not a potential cause for implant failure; implants undergo severe testing, including acceleration tests up to 10G. However the acceleration may have severe side effects. The electrode could get extruded from the cochlea or the implant displaced. The acceleration may also cause the recipients head to be either pressed firmly against another object or to impact with another object. Especially penetrating a water surface during diving headfirst could cause severe pressure on the implant package. This may cause damage to the implant and could result in failure of the receiver stimulator package. Activities with high impact risk are thus not recommended for CI recipients. If a recipient decides to undergo such activities it is recommended to wear a helmet, which leaves enough spacing over the implant site to prevent any pressure being applied. Such a helmet may help to reduce impact forces but cannot fully protect the implant system. Also it is obvious that acceleration could cause the externals (sound processor etc)to spin off the head and be lost. The external components should not be worn during such activities.