Evidence from subgroup comparisons showed no difference in treatment-related changes between cognitive-motor and motor-motor dual tasks , or when interventions were compared to active or inactive controls .
In summary , physical exercise interventions can improve dual-task walking in older adults primarily by increasing the speed at which individuals walk in dual-task conditions .
Currently , evidence concerning whether physical exercise interventions reduce DTC or alter the self-selected dual-task strategy during unobstructed walking is greatly lacking , mainly due to the failure of studies to measure and report reciprocal dual-task effects on the non-gait task
Dual-task interference during walking can substantially limit mobility and increase the risk of  falls among community-dwelling older adults .
Previous systematic review s examining intervention effects on dual-task gait and mobility have not assessed relative dual-task costs ( DTC ) or investigated whether there are differences in treatment-related changes based on the type of dual task or the type of control group .
The purpose of this systematic review was to examine the effects of physical exercise interventions on dual-task performance during walking in older adults .
Training-related changes in dual-task walking performance of elderly persons with balance impairment: a double-blind, randomized controlled trial.
The purpose of this study was to compare the efficiency of three different balance training strategies in an effort to underst and the mechanisms underlying training-related changes in dual-task balance performance of older adults with balance impairment . Elderly individuals with balance impairment , age 65 and older , were r and omly assigned to one of three individualized training programs : single-task ( ST ) balance training ; dual-task training with fixed-priority ( FP ) instruction ; and dual-task training with variable-priority ( VP ) instruction .  Balance control during gait , under practice d and novel conditions , was assessed by calculating the center of mass and ankle joint center inclination angles in the frontal plane . A smaller angle indicated better balance performance . Other outcomes included gait velocity , stride length , verbal reaction time , and rate of response . All measures were collected at baseline and the end of the 4-week training . Results indicated that all training strategies were equally effective ( P>.05 ) at improving balance performance ( smaller inclination angle ) under single-task context s. However , the VP training strategy was more effective ( P=.04 ) in improving both balance and cognitive performance under dual-task conditions than either the ST or the FP training strategies . Improved dual-task processing skills did not transfer to a novel dual-task condition . Results support Kramer et al. 's proposal that VP training improves both single-task automatization and the development of task-coordination skills
Evidence from subgroup comparisons showed no difference in treatment-related changes between cognitive-motor and motor-motor dual tasks , or when interventions were compared to active or inactive controls .
In summary , physical exercise interventions can improve dual-task walking in older adults primarily by increasing the speed at which individuals walk in dual-task conditions .
Currently , evidence concerning whether physical exercise interventions reduce DTC or alter the self-selected dual-task strategy during unobstructed walking is greatly lacking , mainly due to the failure of studies to measure and report reciprocal dual-task effects on the non-gait task
Dual-task interference during walking can substantially limit mobility and increase the risk of  falls among community-dwelling older adults .
Previous systematic review s examining intervention effects on dual-task gait and mobility have not assessed relative dual-task costs ( DTC ) or investigated whether there are differences in treatment-related changes based on the type of dual task or the type of control group .
The purpose of this systematic review was to examine the effects of physical exercise interventions on dual-task performance during walking in older adults .