Kamoun Anis, Hammouda Omar, Turki Mouna, Maaloul Rami, Chtourou Mohamed, Bouaziz Mohamed, Driss Tarak, Souissi Nizar, Chamari Karim, Ayadi Fatma
High Institute of Sport and Physical Education, Ksar-Saïd, Manouba University, Tunis, Tunisia.
The Research Unit of the assessment of musculoskeletal disorders, Sfax University, Sfax, Tunisia.
Biol Sport. 2021 Jun;38(2):245-252. doi: 10.5114/biolsport.2020.97676. Epub 2020 Sep 4.
The present study aimed to investigate the effect of walnut consumption on lipid profile, steroid hormones and inflammation in trained elderly men performing concurrent (resistance and endurance) training. Twenty healthy elderly males were divided into two matched groups, in a randomized controlled trial, that trained three sessions per week: concurrent training + dietary walnut consumption (15 g/day for six weeks, CTW: n = 10); concurrent training + control diet (CT: n = 10). Fasting blood samples were taken 48 hours before and after intervention for biochemical assessments. levels of high-density lipoprotein (HDL) increased only in CTW compared to baseline (19.8%, p < 0.01). Total cholesterol (TC), low-density lipoprotein (LDL) and triglyceride (TG) levels significantly decreased only for CTW (i.e., 13%, 18%, and 18.5% at p < 0.01 for all). Testosterone (T) increased after the training compared to pre-training for CTW and CT (10.3%, p < 0.01, 4.27% p < 0.05, respectively), but the increase was significantly higher in CTW (p < 0.05). Serum cortisol (C) was lower for CTW compared to CT (p < 0.01). C-reactive protein (CRP) decreased in CTW in comparison with CT. The present study revealed that 6-week moderate walnut supplementation (15 g/day) improved lipid profile, steroid hormones and systematic inflammation in aged men performing concurrent training. These findings could be attributable to the potential effect of polyunsaturated fatty acids (PUFA) contained in walnut (linoleic acid, n-6; linolenic acid, n-3).
本研究旨在调查食用核桃对进行同时性（抗阻和耐力）训练的老年男性血脂、类固醇激素和炎症的影响。在一项随机对照试验中，20名健康老年男性被分为两个匹配组，每组每周训练三次：同时性训练+食用核桃饮食（六周内每天15克，CTW组：n = 10）；同时性训练+对照饮食（CT组：n = 10）。在干预前后48小时采集空腹血样进行生化评估。与基线相比，仅CTW组的高密度脂蛋白（HDL）水平升高（19.8%，p < 0.01）。仅CTW组的总胆固醇（TC）、低密度脂蛋白（LDL）和甘油三酯（TG）水平显著降低（即分别为13%、18%和18.5%，p均< 0.01）。与训练前相比，CTW组和CT组训练后的睾酮（T）均升高（分别为10.3%，p < 0.01；4.27%，p < 0.05），但CTW组的升高幅度显著更高（p < 0.05）。与CT组相比，CTW组的血清皮质醇（C）更低（p < 0.01）。与CT组相比，CTW组的C反应蛋白（CRP）降低。本研究表明，为期6周的适度核桃补充（每天15克）改善了进行同时性训练的老年男性的血脂、类固醇激素和全身炎症。这些发现可能归因于核桃中所含多不饱和脂肪酸（PUFA）（亚油酸，n-6；亚麻酸，n-3）的潜在作用。
