Mohammadpour Saba, Djafari Farhang, Davarzani Samira, Djafarian Kurosh, Clark Cain C T, Shab-Bidar Sakineh
Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Iran. No 44, Hojjat-dost Alley, Naderi St., Keshavarz Blvd, Tehran, Iran.
Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran.
BMC Res Notes. 2020 Oct 9;13(1):476. doi: 10.1186/s13104-020-05309-6.
There is limited evidence regarding the association between dietary acid load and muscle strength. Thus, in this study, we investigated the association between dietary acid-base load indices and muscle strength among Iranian adults.
This cross-sectional study was conducted on 270 Iranian adults, aged 18-70 year. Dietary acid load indexes, were calculated by using a validated 168-item semi-quantitative food frequency questionnaire (FFQ). Muscle strength was measured by a digital handgrip dynamometer. There was a significant increase in mean muscle strength of left-hand (MSL), muscle strength of right-hand (MSR) and the mean of the MSL and MSR (MMS) across tertiles of Potential Renal Acid Load (PRAL), Net Endogenous Acid Production (NEAP), and Dietary Acid Load (DAL). Significant linear relationships between PRAL and; MSL (β = 0.24, p < 0.001), MSR (β = 0.23, p < 0.001) and MMS (β = 0.24, p < 0.001), between NEAP and MSL (β = 0.21, p < 0.001), MSR (β = 0.19, p = 0.002), and MMS (β = 0.20, p = 0.001) and between DAL and MSL (β = 0.25, p < 0.001), MSR (β = 0.23, p < 0.001) and MMS (β = 0.24, p < 0.001), were attenuated after controlling for potential confounders. However, the nonlinear relationship between dietary acid load indicators and muscle strength were significant (p < 0.001 for all).
关于饮食酸负荷与肌肉力量之间的关联，现有证据有限。因此，在本研究中，我们调查了伊朗成年人饮食酸碱负荷指标与肌肉力量之间的关联。
这项横断面研究对270名年龄在18至70岁的伊朗成年人进行。饮食酸负荷指标通过使用经过验证的168项半定量食物频率问卷（FFQ）来计算。肌肉力量通过数字握力计进行测量。在潜在肾酸负荷（PRAL）、净内源性酸产生（NEAP）和饮食酸负荷（DAL）的三分位数中，左手平均肌肉力量（MSL）、右手肌肉力量（MSR）以及MSL和MSR的平均值（MMS）均有显著增加。在控制潜在混杂因素后，PRAL与MSL（β = 0.24，p < 0.001）、MSR（β = 0.23，p < 0.001）和MMS（β = 0.24，p < 0.001）之间，NEAP与MSL（β = 0.21，p < 0.001）、MSR（β = 0.19，p = 0.002）和MMS（β = 0.20，p = 0.001）之间，以及DAL与MSL（β = 0.25，p < 0.001）、MSR（β = 0.23，p < 0.001）和MMS（β = 0.24，p < 0.001）之间的显著线性关系减弱。然而，饮食酸负荷指标与肌肉力量之间的非线性关系显著（所有p < 0.001）。
