Keywords Quiz VIII

Pairs of muscles that work together to bring about movement. As one muscle contracts (agonist) the other relaxes (antagonist).

For example, the biceps and triceps. The triceps relax to allow the biceps to contract to flex the arm at the elbow. Roles are reversed to extend the arm at the elbow

A skill performed in a predictable environment, e.g. a player taking a penalty

A form of physical activity done to maintain or improve health and/or fitness; it is not competitive sport

The ability to meet the demands of the environment

Practice that occurs without rest between trials

3rd class levers cannot lift as heavy loads, with the same amount of effort, as 2nd class levers due to the position of the effort and load from the fulcrum

Refers to the weight someone should be, on average, based on their sex, height, bone structure, and muscle girth

Imaginary line dividing the body horizontally from front to back

These are fast twitch muscle fibres, they are used in anaerobic work, but can be improved through endurance training to increase their resistance to fatigue

A training session that includes frequent changes of task so that the skill can be repeated in different situations