Mental imagery is a technique that has been increasingly used to
             enhance motor performance, especially as this relates to fitness and
             sports. According to Annie Plessinger, mental imagery, visualization or
             mental rehearsal, is an experience in the mind that resembles the actual
             experience without any physical activity or stimuli. Another, and perhaps
             clearer, definition is that mental imagery involves the mental repetition
             of a certain skill or movement, without the accompanying physical movement
             ("The Use of Mental Imagery in Soccer"). Basically the definition of the
             term entails that in motor performance, mental imagery entails rehearsal
             using the mind only, without any physical involvement.
             Mental imagery thus means to imagine movement without carrying it out
             (Plessinger). In fitness and sports, this means visualizing a certain
             skill or movement in the mind. This can help the mind to become used to
             the skill in order to better prepare the body for physical performance.
             David Yukelson emphasizes the importance of the appropriate feeling that
             should accompany mental imagery. The image in the mind is then accompanied
             by the desired feeling of for example confidence and control.
             Various terms are used in association with mental imagery as applied
             to fitness and sports. One definition ("The Use of Mental Imagery in
             Soccer") for example includes a division of the term into external and
             internal mental imagery. External imagery occurs when a soccer player for
             example visualizes himself as if he is watching a separate person
             performing the actions. Internal imagery on the other hand occurs with the
             player imagining the actions performed by his own body. Yukelson uses the
             term "feelization" to denote the sensation created by internal imagery.
             The player feels as it were the actions being imagined.
             Different people have differen
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