Skating crossovers on a motorized flywheel: a preliminary experimental design to test effect on speed and on crossovers.

Ice hockey requires frequent skater crossovers to execute turns. Our investigation aimed to determine the effectiveness of training crossovers on a motorized, polyethylene high-resistance flywheel. We hypothesized that high school hockey players training on the flywheel would perform as well as their peers training on ice.

Skate blade neck lacerations: a survey and case follow-up.

Objective: To learn about neck lacerations caused by skate blades in hockey.

Design: A retrospective Web-based survey and follow-up of registered USA Hockey players.

Setting: Three hundred twenty-eight thousand eight hundred twenty-one of 457 038 registered USA Hockey players with a current e-mail address were contacted and invited to participate in the survey.

Ephedra use in a select group of adolescent athletes.

Ephedra-containing dietary supplements are consumed to improve sports performace, but may carry risks of cardiac and neurological adverse events. Little is known of their use by young athletes. Our aim was to determine the prevalence and patterns of ephedra use among high school athletes.

The 'yips' in golf: a continuum between a focal dystonia and choking.

The definition of the 'yips' has evolved over time. It is defined as a motor phenomenon of involuntary movements affecting golfers. In this paper, we have extended the definition to encompass a continuum from the neurologic disorder of dystonia to the psychologic disorder of choking.