Leg muscle imbalance may predict falls in older adults, study reveals

A new study in BMC Geriatrics has uncovered a link between muscle quality imbalance in the legs and the risk of falls among older adults. Researchers used an advanced technique called phase angle analysis to measure differences in muscle integrity between limbs. Their findings suggest that uneven muscle degradation could be a key predictor of falls in later life. The research focused on phase angle values, which assess muscle health by examining the relationship between electrical resistance and reactance in body tissues. Older adults with a history of falls showed significantly greater asymmetry in these values compared to those who had not fallen. This imbalance appeared to disrupt coordinated muscle function, affecting joint stability and movement control.

The degree of asymmetry also matched the frequency and severity of falls reported by participants. This pattern highlights the technique’s potential as a reliable tool for identifying individuals at higher risk. Unlike traditional strength tests, phase angle analysis is non-invasive, quick, and cost-effective, making it practical for widespread use in clinics and care homes.

Looking ahead, the study proposes that wearable bioelectrical impedance devices could continuously track muscle phase angles during daily activities. Such technology might allow for early detection of declining muscle quality. Additionally, the findings support the development of tailored exercise programmes targeting weaker limbs or muscle groups to restore balance and reduce fall risks. The research challenges conventional approaches to assessing muscle health by emphasising quality over sheer strength. By incorporating phase angle asymmetry into routine geriatric screenings, clinicians could improve fall prevention strategies. This shift may lead to fewer injuries and better long-term mobility for older adults.