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VAM is the abbreviation for the Italian term ''velocità ascensionale media'', translated in English to mean "average ascent speed" or "mean ascent velocity", but usually referred to as VAM. The term, which was coined by Italian physician and cycling coach Michele Ferrari, is the speed of elevation gain, usually stated in units of metres per hour. ==Background== VAM is a parameter used in cycling as a measure of fitness and speed; it is useful for relatively objective comparisons of performances and estimating a rider's power output per kilogram of body mass, which is one of the most important qualities of a cyclist who competes in stage races and other mountainous events. Ferrari also stated that every one percent increase in average gradient decreases VAM by 50. For example, a 1700 VAM on a climb of 8 percent average grade is a performance equivalent to a VAM of 1650 on 9 percent average grade. Ambient conditions (e.g. friction, air resistance) have less effect on steeper slopes (absorb less power) since speeds are lower on steeper slopes 〔(【引用サイトリンク】 first = Tim )〕 〔(【引用サイトリンク】 first = Michele )〕 The acronym VAM is not truly expanded in English, where many think the V stands in some way for vertical, and the M represents metres, for instance "Vertical Ascent Metres/Hour." Ferrari says,
A direct translation of "velocità ascensionale media" is "mean (average) ascent velocity" leading to an expansion of the acronym in English as Velocity, Ascent, Mean. 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「VAM (bicycling)」の詳細全文を読む スポンサード リンク
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