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A scrum machine, or scrummaging machine, is a padded, weighty device against which a pack of rugby football forwards can practice scrummaging, and rucking.〔(【引用サイトリンク】title=Team Scrum Machine )〕 The ideal engagement of a pack into a scrum is a simultaneous movement in the hit, shunt and drive. It is the instantaneous force exerted that makes the difference not the sum of all the forces over time. Even small packs that co-ordinate in this fashion and hit 'on the beat' can control their scrums consistently. The purpose of the scrum machine is to provide teams with a safe tool with which to improve the strength and skills of their players.〔(【引用サイトリンク】title=Effective Scrummaging )〕 A similar piece of equipment called a blocking sled is used by American football players. ==Scrum machine types== The most common types are either the sled or the roller. However, there are others, often for specific purposes or needs. * Bespoke - numerous homemade scrum machines are in use. * Indoor 〔(【引用サイトリンク】title=Indoor Scrum Machines )〕 * Junior - For training children. * One-man - Against which forwards, rather than a pack, can practice their scrum skills. * Portable - often abled to be folded down, and with a container on the back which can be filled with sand or water to bolster weight. * Trailer - which can be attached and detached from a vehicle. 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「Scrum machine」の詳細全文を読む スポンサード リンク
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