Eccentric Contraction:
This is a contraction in which the muscle lengthens and works with gravity.

Explosiveness:
The muscle's ability to create strength as quickly and as forcefully as possible.

Extensors:
These are the muscles that increase the angle at a joint. For example, the quadriceps extend the knee (straighten it).

Easy Set Exercise not close to maximum effort, as in a warm-up.

Eccentric Contraction Muscle lengthens while maintaining tension.

Electrolytes Capable of conducting electricity in a solution. Used in many body activities, potassium, sodium and chloride are all forms of electrolytes.

Emotional Storm A traumatic emotional experience that is likely to effect the human organism physiologically.

Endogenous Naturally occurring body productions.

Endurance Ability of a muscle to produce force continually over a period of time.

Enzyme Helpful protein molecules, responsible for a multitude of chemical reactions within the body.

Ergogenic Something that can increase muscular work capacity.

EFA's Essential Fatty Acids Required by the body, however only obtainable from food sources, such as flaxseed oil and safflower oil.

Exercise Activity done for the purpose of keeping fit and healthy, or sociable in a group form like football.

Extension Body part (i.e. hand, neck, trunk, etc.) going from a bent to a straight position, as in leg extension.