Lumbar paraspinal muscle cross-sectional area

Aging over 4 years are associated with lumbar paraspinal muscle cross-sectional area in humans (-4.1% from baseline).

“LPM cross-sectional area and total muscle volume showed modest decreases (-4.1% and -3.6%, respectively; both P < .001)”

Humanscommunity-dwelling older adultslumbar paraspinal muscle4 yearsn = 66

Muscle Quality Deteriorates More Rapidly Than Muscle Quantity in Lumbar Paraspinal Muscles: A 4-Year Longitudinal MRI Study

Journal of the American Medical Directors Association·22 Jul 2026