VAF should be considered in the rehabilitation of lower extremity musculoskeletal dysfunctions .
However , it can not be unequivocally confirmed that VAF is effective in this population , owing to study heterogeneity and a lack of high- quality evidence .
Nevertheless , positive effects on lower extremity biomechanics and postural control have been identified .
BACKGROUND Verbal augmented feedback ( VAF ) is commonly used in physiotherapy rehabilitation of individuals with lower extremity musculoskeletal dysfunction or to induce motor learning for injury prevention .
Its effectiveness for acquisition , retention and transfer of learning of new skills in this population is unknown .
OBJECTIVES First , to investigate the effect of VAF for rehabilitation and prevention of lower extremity musculoskeletal dysfunction .
Second , to determine its effect on motor learning and the stages of acquisition , retention and transfer in this population .
Feedback-Induced Variability and the Learning of Generalized Motor Programs.
As compared with providing extrinsic feedback on each of a set of practice trials , reducing the feedback frequency in various ways facilitates long-term retention . One explanation is that frequent feedback operates proactively on the subsequent trial , inducing excessive variability that de grade s learning . We tested this view by giving or not giving feedback " reminders , " where the postresponse feedback was given again just before the next attempt at a task . The reminder manipulation was examined in both  blocked and r and omized practice sequences during the learning of three limb-patterning tasks .  Reminder feedback increased response variability during practice in both r and om and blocked practice . As measured in retention tests , though , feedback reminders de grade d learning in r and om practice , but not in blocked practice . This implies that the frequently found learning advantages of r and om , as compared with blocked , practice might be due to feedback 's facilitation of retrieval operations in blocked practice ( as well as in r and om practice with feedback reminders ) ; such overfacilitation of retrieval operations has been shown to de grade learning . Additional analyses revealed that r and om , as compared with blocked , practice enhanced the learning of the fundamental pattern of action ( generalized motor program ) but had little effect on the ability to scale the pattern in amplitude or time ( parameterization )
VAF should be considered in the rehabilitation of lower extremity musculoskeletal dysfunctions .
However , it can not be unequivocally confirmed that VAF is effective in this population , owing to study heterogeneity and a lack of high- quality evidence .
Nevertheless , positive effects on lower extremity biomechanics and postural control have been identified .
BACKGROUND Verbal augmented feedback ( VAF ) is commonly used in physiotherapy rehabilitation of individuals with lower extremity musculoskeletal dysfunction or to induce motor learning for injury prevention .
Its effectiveness for acquisition , retention and transfer of learning of new skills in this population is unknown .
OBJECTIVES First , to investigate the effect of VAF for rehabilitation and prevention of lower extremity musculoskeletal dysfunction .
Second , to determine its effect on motor learning and the stages of acquisition , retention and transfer in this population .