TY - JOUR
T1 - Effects of a priority-based dual task on gait velocity and variability in older adults with mild cognitive impairment
AU - Lee, Jihye
AU - Park, Seungha
N1 - Publisher Copyright:
© 2018 Korean Society of Exercise Rehabilitation.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - The purpose of this study to investigate how gait velocity and variability were affected by dual task prioritization in older adults with normal cog-nitive function and older adults with mild cognitive impairment (MCI). Eight older adults with MCI and eight cognitively normal older adults performed a walking task under usual walking with no dual task (usual gait), walk while counting backward from 100 by ones with no priority on task (no priority), walk and count while instructed to prioritize gait task (gait priority), and walk and count while instructed to prioritize the cognitive task (cognitive priority). The MCI group showed significantly slower walking speed than the normal group in the no priority condition, but no difference between both group in the usual gait condition, and they almost 3 times greater gait variability in the no priority condition than the normal group. For the effect of priority instructions, MCI group showed a dual-task cost to gait velocity almost 2 times higher than that of the normal group in the no priority condition, but the cost was almost three times higher in both gait and cognitive priority conditions. Although there was no interaction effect for gait variability, MCI group tended to be more influenced by dual task prioritization than the normal group. Our findings confirmed that the priority-based dual task paradigm is a valid way to assess gait characteristics of people with cognitive problems.
AB - The purpose of this study to investigate how gait velocity and variability were affected by dual task prioritization in older adults with normal cog-nitive function and older adults with mild cognitive impairment (MCI). Eight older adults with MCI and eight cognitively normal older adults performed a walking task under usual walking with no dual task (usual gait), walk while counting backward from 100 by ones with no priority on task (no priority), walk and count while instructed to prioritize gait task (gait priority), and walk and count while instructed to prioritize the cognitive task (cognitive priority). The MCI group showed significantly slower walking speed than the normal group in the no priority condition, but no difference between both group in the usual gait condition, and they almost 3 times greater gait variability in the no priority condition than the normal group. For the effect of priority instructions, MCI group showed a dual-task cost to gait velocity almost 2 times higher than that of the normal group in the no priority condition, but the cost was almost three times higher in both gait and cognitive priority conditions. Although there was no interaction effect for gait variability, MCI group tended to be more influenced by dual task prioritization than the normal group. Our findings confirmed that the priority-based dual task paradigm is a valid way to assess gait characteristics of people with cognitive problems.
KW - Dual task
KW - Gait
KW - Mild cognitive impairment
KW - Priority
UR - http://www.scopus.com/inward/record.url?scp=85059529180&partnerID=8YFLogxK
U2 - 10.12965/jer.1836402.201
DO - 10.12965/jer.1836402.201
M3 - Article
AN - SCOPUS:85059529180
SN - 2288-176X
VL - 14
SP - 993
EP - 997
JO - Journal of Exercise Rehabilitation
JF - Journal of Exercise Rehabilitation
IS - 6
ER -