Using Isometric Squat Strength to Predict Concentric and Eccentric Squat Strength in Young and Older Adults.
Michael T Dunn, Phuong T M Quach, Monica McGraw and 5 others
PMID 39921916WHAT IT FOUND
In older adults, isometric squat strength predicted concentric and eccentric 1RM, allowing safe estimation of lifting capacity.
In young adults, no such relationship existed. Use isometric testing to guide rehab loads for older patients, but not for younger ones.
Key findings
01For older adults, isometric squat strength significantly predicted both eccentric and concentric 1RM squat strength.
02For young adults, isometric squat strength did not predict either eccentric or concentric 1RM squat strength.
03The study provides regression equations to estimate 1RM eccentric and concentric strength from isometric strength in older adults.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
Sample size was small (29 participants), which limits the generalizability of the findings. The study did not analyze whether sex affected the predictive relationships. Physical activity levels were not controlled for, which could influence strength outcomes. The study was conducted on healthy adults, so it is unclear if these equations apply to patients with musculoskeletal conditions or pain.
Declared interests
The authors declare no conflicts of interest.
The easy way to misread this
Do not assume isometric squat strength predicts 1RM in young adults. The study found no significant relationship in this group, so using isometric tests to estimate max lifting capacity for younger patients is not supported by these results.