Article

Although step training improves the ability of quick stepping, some
home-based step training systems train limited stepping directions and may cause
harm by reducing stepping performance in untrained directions. This study
examines the possible transfer effects of step training on stepping performance
in untrained directions in older people. METHODS: Fifty four older adults were
randomized into: forward step training (FT); lateral plus forward step training
(FLT); or no training (NT) groups. FT and FLT participants undertook a 15-min
training session involving 200 step repetitions. Prior to and post training,
choice stepping reaction time and stepping kinematics in untrained, diagonal and
lateral directions were assessed. RESULTS: Significant interactions of group and
time (pre/post-assessment) were evident for the first step after training
indicating negative (delayed response time) and positive (faster peak stepping
speed) transfer effects in the diagonal direction in the FT group. However, when
the second to the fifth steps after training were included in the analysis, there
were no significant interactions of group and time for measures in the diagonal
stepping direction. CONCLUSIONS: Step training only in the forward direction
improved stepping speed but may acutely slow response times in the untrained
diagonal direction. However, this acute effect appears to dissipate after a few
repeated step trials. Step training in both forward and lateral directions
appears to induce no negative transfer effects in diagonal stepping. These
findings suggest home-based step training systems present low risk of harm
through negative transfer effects in untrained stepping directions. TRIAL
REGISTRATION: ANZCTR 369066.
CI - Copyright (c) 2017 Elsevier B.V. All rights reserved.

Langue : ANGLAIS