Importance A rule prohibiting a direct hit to the lateral side of the head (ie, Rule 48–Illegal
Check to the Head) was introduced in the National Hockey League (NHL) in the 2010-2011 …

ABSTRACT Objectives In American football, hand injuries have been shown to negatively
impact performance. The purpose of this study is to characterize the prevalence and severity …

Background: The targeting rule was adopted by the National Collegiate Athletic Association
(NCAA) in 2008 to discourage dangerous contact during collegiate American football …

Background Researchers often use publicly available data sources to describe injuries
occurring in professional athletes, developing and testing hypotheses regarding athletic …

Background: There has been little focus on concussions in youth lacrosse players in the
United States. Purpose: To provide a descriptive analysis of the epidemiology and incidence …

Despite enormous revenue production and a recent trend of investment in sport medicine
research, American football has yet to make a measurable investment in sport performance …

Objective To investigate the effect of multiple concussions on the risk of lower-extremity
injuries in National Football League (NFL) players. Methods All active NFL players from …

Objective This observational study examines the associated risk for concussion following
'lowering the helmet to initiate contact'penalties in the National Football League. Methods …

Objective: This observational study examines the associated risk for concussion following
'lowering the helmet to initiate contact'penalties in the National Football League. Methods …