Is an abbreviation for cardiovascular.
Cardiovascular exercise is a type of exercise that increase your heart rate, circulation and blood flow.
Chins is an abbreviation for chin ups or pull ups.
Circuit training is a combination of different exercises that are performed one after the other. The circuit is finished once all the prescribe exercises are completed.
Concentric contraction is the shortening of a muscle whilst it contracts. E.g. the upward (curl) phase of a bicep curl.
Crossfit is a strength and conditioning programme that focuses on all aspects of fitness from Olympic lifting to gymnastics. It incorporates functional movements and is constantly varied.