TY  - JOUR
PY  - 2014//
TI  - A comparison of two walking while talking paradigms in aging
JO  - Gait and posture
A1  - Li, Clara
A1  - Verghese, Joe
A1  - Holtzer, Roee
SP  - 415
EP  - 419
VL  - 40
IS  - 3
N2  - BACKGROUND: Our study aimed to [1] compare dual-task costs in gait and cognitive performance during two dual-task paradigms: walking while reciting alternate letters of the alphabet (WWR) and walking while counting backward by sevens (WWC); [2] examine the relationship between the gait and cognitive interference tasks when performed concurrently. SCOPE: Gait and cognitive performance were tested in 217 non-demented older adults (mean age 76±8.8 years; 56.2% female) under single and dual-task conditions. Velocity (cm/s) was obtained using an instrumented walkway. Cognitive performance was assessed using accuracy ratio: [correct responses]/[total responses]. Linear mixed effects models revealed significant dual-task costs, with slower velocity (p<.01) and decreased accuracy ratio (p<.01) in WWR and WWC compared to their respective single task conditions. Greater dual-task costs in velocity (p<.01) were observed in WWC compared to WWR. Pearson correlations revealed significant and positive relationships between gait and cognitive performance in WWR and WWC (p<.01); increased accuracy ratio was associated with faster velocity. <br><br>CONCLUSIONS: Our findings suggested that dual-task costs in gait increase as the complexity of the cognitive task increases. Furthermore, the positive association between the gait and cognitive tasks suggest that dual-task performance was not influenced by task prioritization strategies in this sample.<p />  <p>Language: en</p>
LA  - en
SN  - 0966-6362
UR  - http://dx.doi.org/10.1016/j.gaitpost.2014.05.062
ID  - ref1
ER  -