A large amount of work per stroke is the most important technical factor in speed skating .
Is a representative mechanical variable for performance level ( de Boer et al. , 1986 ; Ingen Schenau et al. , 1985 ) .
A large amount of work per stroke is the most important technical factor in speed skating and is a representative mechanical variable for performance level ( de Boer et al. , 1986 ; Ingen Schenau et al. , 1985 ) .