ABSTRACT
Objective
External abdominal pressure may reflect both respiratory and physical functions. However, the nature of these relationships in community-dwelling older adults remains unclear. Therefore, in this study, we aimed to clarify the relationships between external abdominal pressure and respiratory and physical functions in community-dwelling older adults.
Methods
Respiratory function and muscle strength were evaluated using a spirometer. Physical function was assessed using grip strength, knee extensor strength, chair stand test, 5-m walking speed, seated stepping and one-leg standing test. Age, sex, height and weight were adjusted, and Pearson’s correlation and multiple regression analyses were performed.
Results
Sixty-seven community-dwelling older adults participated in a physical fitness measurement session, including external abdominal pressure measurements. External abdominal pressure was significantly and positively correlated with vital capacity (VC), forced VC, forced expiratory volume in 1 s, maximum inspiratory mouth pressure (PImax), knee extensor strength and grip strength. Sex and knee extensor strength were independent factors associated with external abdominal pressure.
Conclusions
External abdominal pressure in older adults was associated with both respiratory and physical functions. Sex and lower-limb muscle strength were identified as independent associated factors. These findings suggest that external abdominal pressure may be a useful non-invasive indicator reflecting physical function in older adults.