An unconditional waiver is basically a waiver of all present and future legal rights. Such a waiver is most often utilized in the construction context by homeowners or professional construction companies wanting to protect themselves from mechanics' liens.
In most cases, a doctor who specializes in sports medicine will do a range of activities on a daily basis. Some of their most common patients are athletes, since sport injuries are very common and most athletic activities involve very forceful play.
Sports doctors -- also known as sports medicine physicians -- work with athletes, athletic trainers, coaches, and various types of sports teams to help prevent and treat athletic injuries. These professionals are licensed medical doctors who have graduated from medical school with a Doctor of Medicine degree. Over the course of their high school, undergraduate and medical school preparation, sports doctors take multiple science classes to prepare them for their career.