Sports Equipment: Equipment required for engaging in a sport (such as balls, bats, rackets, skis, skates, ropes, weights) and devices for the protection of athletes during their performance (such as masks, gloves, mouth pieces).Sports Medicine: The field of medicine concerned with physical fitness and the diagnosis and treatment of injuries sustained in exercise and sports activities.Doping in Sports: Illegitimate use of substances for a desired effect in competitive sports. It includes humans and animals.Equipment and Supplies: Expendable and nonexpendable equipment, supplies, apparatus, and instruments that are used in diagnostic, surgical, therapeutic, scientific, and experimental procedures.Athletic Injuries: Injuries incurred during participation in competitive or non-competitive sports.Equipment and Supplies, Hospital: Any materials used in providing care specifically in the hospital.Racquet Sports: Games in which players use a racquet to hit a ball or similar type object.Durable Medical Equipment: Devices which are very resistant to wear and may be used over a long period of time. They include items such as wheelchairs, hospital beds, artificial limbs, etc.Equipment Design: Methods of creating machines and devices.Protective Devices: Devices designed to provide personal protection against injury to individuals exposed to hazards in industry, sports, aviation, or daily activities.Athletes: Individuals who have developed skills, physical stamina and strength or participants in SPORTS or other physical activities.Athletic Performance: Carrying out of specific physical routines or procedures by one who is trained or skilled in physical activity. Performance is influenced by a combination of physiological, psychological, and socio-cultural factors.