Gymnasia apparatus such as barbells, parallel bars, jumping board, running path, tennis-balls, cricket field, fencing area, and so forth are used as exercises. In safe weather, outdoor locations are the most conducive to health.Gyms were popular in ancient Greece. Their curricula included Gymnastica militaria or self-defense, gymnastica medica, or physical therapy to help the sick and injured, and gymnastica athletica for physical fitness and sports, from boxing to dancing.