Velocity - specificity probably happens for many reasons, including greater increases in single fiber
contractile velocity (including fiber type shifts), greater increases in early phase neural drive, more suppressed co-activation, and bigger improvements in co-ordination, compared to low - velocity (heavy load) training.
Strength training is velocity - specific, and this seems to arise from both central and peripheral mechanisms, which affect rate of force development (RFD) and maximum
contractile velocity.
The greater gains in strength - to - size that result from an increase in specific tension are not reflected in improvements in muscle power, because the reduction in
contractile velocity counteracts the effects of the increased muscle fiber force (Erskine et al. 2011).
This indicates that there are other features of muscle fibers that determine
contractile velocity.
Not exact matches
This suggests that one way in which
velocity - focused training produces
velocity - specificity is by altering
contractile components of the individual muscle fibers.
This reduces the effective
contractile length of muscle fibers, reducing the shortening
velocity, and increasing force production (Erskine et al. 2011).