Correlation between dual tasking and lower limb strength in community-dwelling elderly

Dual Tasking represents the mutual communication between the motor and cognitive functions. Due to the decreasing stability and postural control with age, elderly people need more attention to protect their balance. Cognitive task and manual task have been used as an additional attention-demanding task in research on dual-tasking. Studies have found poor muscle strength significantly compromises the functional independence in walking, posture and balance control.

This study aims to find correlation between dual tasking and lower limb strength in community dwelling elderly peoples.

Observational, analytical study was conducted using purposive sampling. Males and females, ≤65 years, twenty-five who have fallen at least 1 time in the past 1 year (Faller) and twenty five with no history of fall within last 1 year (Non-faller), ability to live independently, ability to walk without any assistance were included. Participation was voluntary and informed consent was taken. TUG (manual), TUG (cognitive) test was used to assess dual tasking. 30 sec chair stand test was used to assess lower limb strength. Each subject was given appropriate rest period between all tests. Statistical analysis was done in SPSS v20. Spearman correlation coefficient was used to find correlation of dual tasking and lower limb strength was used in elderly

There is strong negative correlation between dual (manual) tasking and lower limb strength (r = -0.677, p <0.001). There is strong negative correlation between dual (cognitive) tasking and lower limb strength (r = -0.662, p <0.001). Regression analysis was done for age and fall history.

A strong correlation is found between dual tasking and lower limb strength. They should be assessed in geriatrics with or without fall history. Studies using appropriate strategies to improve strength or cognition during intervention can be conducted.