... of skills, to gain an understanding of the mechanical effectiveness of their execution and to identify the factors underlying their successful performance. This knowledge and understanding can help to enhance the learning and performance of those skills. Until recently most practical coaches have been reluctant to use biomechanics. Carr (1997) reported "most people involved in coaching are reluctant to study sport mechanics because from past experience they know it has meant tackling text loaded with formulas, calculations and scientific technology." This is very much true, but with the advent of more technical kicking and throwing in games, studies involving biomechanics are becoming increasingly popular. Throw-ins are very important and each team will take 25 or more of them during a game. A study by Lees (1993) concluded that the throw in is the most common way of restarting a game, and when performed correctly has great tactical significance. The throw in has evolved ...

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