<span>From the presented choices in this item, the statement that is not true about how medical problems can affect the composition of the body is letter a. Medical problems can improve one's body composition. In reality, the composition of the body is not improved by the medical conditions, it worsens it. </span>
The main contributing factors that cause back injuries in the workplace are lifting and/ or carrying heavy loads, frequently twisting and bending over, and hard physical work.
<span>1.) oxygen
2.) density, trunk
3.) spine
<span>4.) 30</span></span>