Association Between Dietary Acid Load and Grip Strength in Adults 50 Years and Older: A Cross-Sectional Study

Minimal data exist on whether the acid–base balance of the diet is linked to muscle strength. The aim of this study was to determine if dietary acid load is associated with grip strength in a nationally representative sample of middle- to older-age adults. We examined the cross-sectional association...

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Bibliographic Details
Published in:Calcified tissue international 2024-10, Vol.115 (4), p.373-381
Main Authors: Konieczynski, Elsa M., Ceglia, Lisa, Reitshamer, Elise, Dawson-Hughes, Bess
Format: Article
Language:English
Subjects:
25-Hydroxyvitamin D
Acid production
Acids
Acids - metabolism
Aged
Biochemistry
Biomedical and Life Sciences
Cell Biology
Cross-Sectional Studies
Diet
Diet - statistics & numerical data
Endocrinology
Female
Glomerular filtration rate
Hand Strength - physiology
Humans
Life Sciences
Male
Middle Aged
Muscle strength
Nutrition Surveys
Original Research
Orthopedics
Physical activity
Regression analysis
Women
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Summary:Minimal data exist on whether the acid–base balance of the diet is linked to muscle strength. The aim of this study was to determine if dietary acid load is associated with grip strength in a nationally representative sample of middle- to older-age adults. We examined the cross-sectional association of grip strength with dietary acid load quantified through potential renal acid load (PRAL) and net endogenous acid production (NEAP) in 4,059 adults aged 50 years and older in the 2011–2014 NHANES survey cycles. PRAL and NEAP were estimated from two 24-h recalls and categorized into sex-specific quartiles. Grip strength was measured on a dynamometer. Multiple linear regression models were used to determine the associations of PRAL and NEAP (as quartiles) with grip strength for men and women separately, adjusting for total energy, age, race/ethnicity, weight, physical activity, smoking, serum 25-hydroxyvitamin D, and estimated glomerular filtration rate. Mean grip strength was 26.8 ± 0.2 kg in women and 43.0 ± 0.4 kg in men. Adjusted grip strength was inversely associated with quartiles of PRAL (p trend  = 0.049) and NEAP (p trend  = 0.034) in women with quartile 4 vs 1 differences of − 1.21 and − 1.08 kg (both p  
ISSN:1432-0827
0171-967X
1432-0827
DOI:10.1007/s00223-024-01258-5