Regardless of the mechanism involved, it seems that repeated
elongation of the muscle during stretch is the key to inducing changes,
both neural or mechanical (Williams, 1990). There is no consensus
either in clinical practice or in the literature, with regards to the
appropriate time of application, duration or frequency of stretch.
However, before determining the appropriate stimuli for long-term
adaptations, it should first be established whether spastic muscles are
indeed able to receive a stretch during changes in joint RoM.