A single-blind RCT included forty patients with PD and found that the dual-task group showed a trend but no significant improvement in the executive function test (Frontal Assessment Battery and Trail Making Test) after training compared to the single-task training group (gait training) [ 28 ].
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The Impact of Motor-Cognitive Dual-Task Training on Physical and Cognitive Functions in Parkinson's Disease.
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The gait variability in the step length in the single-task condition decreased but did not reach statistical significance [ 23 ].
The trend of improvement in the cognitive test (Stroop) after dual-task training was also found in another study, but this improvement failed to reach statistical significance [ 29 ]. 4.