Associations of lower-limb muscle strength performance with static and dynamic balance control among older adults in Taiwan.

BACKGROUND

Aging is an inevitable process of life development. These physical changes can cause a decline in the functional adaptability and health status of older adult individuals.

AIMS

The purpose of this study was to investigate the association of lower-limb muscle strength performance with static and dynamic balance control among older adults in Taiwan.

METHODS

We conducted a cross-sectional study and reviewed data derived from the National Physical Fitness Survey in Taiwan 2015-2016. A total of 20,846 Taiwanese older adult individuals aged 65 years old or older were recruited as study participants. Demographic characteristics, anthropometric assessments, lifestyle habits, and health-related physical fitness measurements from this dataset were analyzed using the chi-square test, one-way analysis of variance, and linear regression analysis. Lower-limb muscle strength performance was classified into 4 groups based on quartile (Quartile 1 [Q1], Quartile 2 [Q2], Quartile 3 [Q3], and Quartile 4 [Q4]) values.

RESULTS

Increased lower-limb muscle strength levels were significantly associated with static balance in men (Q2:  = 2.539,  < 0.0001; Q3:  = 4.590,  < 0.0001; Q4:  = 7.700,  < 0.0001) and women (Q2:  = 2.022,  < 0.0001; Q3:  = 4.179,  < 0.0001; Q4:  = 6.920,  < 0.0001) after adjusting for potential confounders. In addition, we observed that increased lower-limb muscle strength levels were significantly associated with dynamic balance in men (Q2:  = -1.661,  < 0.0001; Q3:  = -2.434,  < 0.0001; Q4:  = -3.091,  < 0.0001) and women (Q2:  = -1.660,  < 0.0001; Q3:  = -2.548,  < 0.0001; Q4:  = -3.196,  < 0.0001) after adjusting for potential confounders.

CONCLUSION

Lower-limb muscle strength was the most important factor, as it was an improved method for static and dynamic balance control in both genders.