Physical activity and nutrient intake levels according to grip strength among single-household elderly in Korea: data from 2014 and 2019 Korea National Health and Nutrition Examination Survey (KNHANES).

Purpose: We analyzed the differences in physical activity (PA) levels and nutrient intake based on grip strength among elderly men and women in single-person households (ESH) in Korea.

Methods: Data were obtained from 1,581 ESH individuals (aged ≥65 years) from the Korean National Health and Nutrition Examination Survey (2014-2019). PA levels (occupational and recreational moderate-intensity activities, travel to and from places, walking, and strength training) and nutrient intake (including, total energy, carbohydrates, protein, and fat) were analyzed.

Results: Men exhibited no differences in PA related to grip strength, except for the number of strength training days (p=0.000). Women with higher grip strength engaged more in recreational activities, travel, and strength training (all, p=0.000). Men with higher grip strength consumed more protein, while women consumed greater amounts of total fat (p=0.030), monounsaturated fatty acids (MUFA) (p=0.024), and polyunsaturated fatty acids (PUFA) (p=0.011). Both sexes had increased Vitamin C intake (men: p=0.023, women: p=0.020).

Conclusion: Sex-related differences in PA levels and nutrient intake based on grip strength were observed among older individuals in ESH. Women require programs to enhance diverse PA and balance fat intake, while men need interventions focused on strength training and protein intake.