Among the leading cause of death for young adults (25–44 years old), trailing only accidents are suicides, heart disease, muscular degeneration, or asthma

Trauma of all forms kills more people in the us between the age ranges, than most other deaths. This is normally due to the fact that chronic diseases are either not present or are in beginning stages. In the United States, accident as said are the leading cause of death for those in this age range, however the second one is Suicide, which has showed a great increase and rise among the population. 

The two answers are static and awkward postures.