The trampoline has become popular among children and adolescences during the recent years which is good because it endorses psychical activity. However, around 100 000 persons are injured every year only in the United States, study shows. Because of the amount of people and because the young age group can obtain long term injuries, there are reasons to find new ways to improve trampoline safety.

Firstly, the problem was identified by doing data analysis with NEISS which is a database that contains consumer product-related injuries. The data provided information regarding the most critical types of injuries which is caused by trampoline use. With an FMEA the three most critical injuries were identified and those were: lower leg-, lower arm- and internal head injury. Secondly, to understand the cause of the selected injuries, further data analysis and literature studies were done to find connections between the injury mechanism and the anatomy.

The results show that internal head injuries often occur after fall from the trampoline, lower leg injuries were the result of an incorrect landing, and lower arm fractures were caused by landing on an outstretched arm. In every injury case, the most vulnerable age group was children between 0-6 years of age. An explanation for this is that young children have not had their growth-plates hardened and are therefore more exposed to fractures.

Lastly, with the help of the information about the injuries and the accidents, product developing process was initiated to create a product that can improve trampoline safety. The process included: identifying customer needs, product specification, conceptualization, system leveled design, and assessments for intellectual properties and patents, regulations, and product safety.

This resulted in the development of a harness, specifically for backyard trampolines with the purpose to provide the user with stability, dampened landings and from falling off the trampoline. The harness can be used by young children for casual jumping and by older children for doing tricks.