Lower extremity muscle strength equation of older adults assessed by Five Time Sit to Stand Test (FTSST).
Weerasak Tapanya, Noppharath Sangkarit, Patchareeya Amput and 1 others
PMID 38577394WHAT IT FOUND
In 121 older adults, sit-to-stand time, body weight and gender were used to estimate knee extensor strength.
Slower five sit-to-stand times went with lower measured strength.
Key findings
01In 121 older adults, slower Five-Time Sit-to-Stand Test times were associated with lower measured knee extensor strength.
02A prediction model using sit-to-stand time, body weight and gender accounted for roughly 70.1% of the variation in measured knee extensor strength.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The study included only community-dwelling older adults who could walk independently, so it may not apply to people with stroke, Parkinson disease, spinal cord injury, lower-limb fractures, osteoarthritis, rheumatoid arthritis, dislocation, or major sensory or communication problems. The sample size was described as modest, and the authors say larger samples are needed before findings are taken as a more accurate reflection of the elderly population. Knee extensor strength was measured with a push-pull dynamometer, which the authors say is not the isokinetic dynamometer gold standard. The study is cross-sectional, so it reports association rather than a tested intervention effect.
Declared interests
The authors declared no conflict of interest. The work was funded by Thailand Science Research and Innovation funds, the University of Phayao (Grant No. FF66-UoE009), and the School of Allied Health Science (AHS-RD-65003).
The easy way to misread this
Do not use this equation as a replacement for direct strength testing in people the study excluded. The equation was built from community-dwelling adults aged 60 or older who could walk independently, and the authors say the sample was modest.