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Swing timing is concerned with the inter-relationships between ball sports hitting implements and the related anatomical parts of players, in the motor skill of striking sports balls as used in various games. More specifically, swing timing commonly refers to the efficiency of ball hitting or kicking skills by achieving optimum power at instant of ball impact. Furthermore, swing timing also refers to the inter-relationship between optimum power as generated and the intended point of ball contact. Perfect swing timing is therefore achieved when ball is struck with optimum power, with least energy expenditure, and at contact point that achieves the desired direction and velocity of ball after impact. Of all the motor skill components essential for expert ball play, swing timing is the most difficult to acquire, and teach, because of the essential millisecond co-ordination of major and minor muscle groups to impart optimal progressive acceleration to the hitting implement until it has reached greatest velocity and optimum angle at moment of ball impact. Arguably the best ball players have superior swing timing to achieve greatest ball impact velocities for greatest speed and/or distance, and a highly tuned muscle memory, or ‘feel’, to more consistently repeat or adjust swing as determined by the changing success requirements which vary from one ‘shot’ to another, and the ability to fine-tune swing velocity and impact point and angle. The answer still eluding even top teaching professionals; be it in golf, tennis, baseball, racketball, squash, cricket and even ball-kicking sports including European, American and Australian football, and rugby; is how to more effectively teach correct swing timing, the essence of the ‘perfect swing technique’. Some common and fairly accurate perceptions of correct Swing Timing include a relaxed posture and muscle groups, which are only called into action in precisely timed intervals, and which relax instantly after ball contact is made; and an apparent ‘80% Only’ effort, which appears to promote the desired relaxed state during the whole swing. But the inability to more accurately observe these split-second, highly complex correlations and co-ordination; therefore, more often than not, encourages the teaching of specific and isolated swing components only, which tends to disrupt ‘natural’ swing mechanics and timing rather than enhancing these. For this reason, correct swing timing, still remains confined to trial and error techniques, where the naturally gifted player eliminates errors more quickly, and acquires accurate muscle memory faster. As visual feedback of actual swing remains elusive, an increasingly popular technique is to focus on correct swing rhythm, which can be more easily internalized, thereby accelerating essential muscle memory. Therefore one of the most effective teaching and practice tools is music, where the rhythm of music and ‘perfect swing’ are identical for a given player. In this method there is a more identifiable correlation of actual swing versus ideal by the degree of synchronization achieved. Other audio and tactile swing timing feedback devices have already been developed. These devices have proven to be highly effective in teaching ‘near perfect swing timing’ even to youngsters in a natural play learning experience. ==Swing timing versus swing rhythm== In the existing related literature, these two terms are freely interchanged. Yet it appears that failure to recognize the key difference is another reason for the difficulty in their understanding, and thereby the difficulty in achieving correct swing mechanics, timing and rhythm. Whereas swing timing is pertinent to the sequence of vital swing components coming into effect for optimum ball contact, Swing rhythm is the tempo of the complete swing, which traditionally includes the backswing, and a vital pause between backswing and final swing towards ball impact. In swing timing the emphasis is therefore on the correct sequence of the various elements of the total swing. Whereas in swing rhythm the focus is on the tempo, and relative 'weight' of each component within that tempo of the ideal personal swing. Focus on swing rhythm, either in teaching or personal practice, is considered preferable. Correct swing rhythm results in faster 'feel' of correct timing mechanics, and reduces interference with that vital process by eliminating risk of undue emphasis on individual components of the total swing. To achieve perfect swing timing in this approach, it only remains to fine-tune this rhythm to ensure that the 'down beat' coincides perfectly with ball impact. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Swing timing」の詳細全文を読む スポンサード リンク
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