Bioelectrical impedance vector analysis and phase angle in response to resistance training volume reduction in older women.

IF 3.3 3区 医学 Q2 NUTRITION & DIETETICS
Melissa Antunes, Leandro Dos Santos, Luís Alberto Gobbo, Analiza M Silva, Paolo M Cunha, Witalo Kassiano, Letícia T Cyrino, Hellen C G Nabuco, Ricardo J Rodrigues, Luís B Sardinha, Edilson S Cyrino
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Abstract

Background: Bioelectrical impedance vector analysis (BIVA) and phase angle (PhA) are important for monitoring hydration, muscle function, and quality of life in older adults. Resistance training (RT) can counteract aging's adverse effects on cellular integrity and function.

Objective: This study compared the effects of RT volume reduction on BIVA and PhA in physically independent older women. Sixty-seven participants (>60 years) underwent a 20-week standardized whole-body RT program (eight exercises, three sets each, 8-12 repetitions, three non-consecutive days per week in the morning). They were then randomly assigned to one of the three eight-week training conditions following the training model described above: reduced volume to one set (RV1, n = 22), two sets (RV2, n = 24), or maintained volume (MV, n = 21). Bioimpedance spectroscopy measured total body water (TBW), intracellular (ICW), and extracellular (ECW) water, BIVA, and PhA based on resistance (R), impedance (Z), reactance (Xc), and height (H). All groups showed significant increases in TBW, ICW, and ECW during the volume reduction phase (P < 0.05).

Results: R, R/H, Z, and Z/H decreased across all groups, with significant changes from the pre-conditioning phase in the RV1 and RV2 groups (P < 0.05). Xc and Xc/H increased during the pre-conditioning phase across all groups and returned to baseline during the volume reduction phase (P < 0.05). PhA increased during the pre-conditioning and was maintained during the volume reduction phase (RV1 = +0.33°, RV2 = +0.50°, MV = +0.47°; P < 0.05).

Conclusion: These results suggest that reducing RT volume by up to one-third can still improve PhA, BIVA, and hydration status in older women.

老年妇女抗阻训练量减少的生物电阻抗矢量分析和相位角。
背景:生物电阻抗矢量分析(BIVA)和相位角(PhA)对于监测老年人的水合作用、肌肉功能和生活质量很重要。抗阻训练(RT)可以抵消衰老对细胞完整性和功能的不利影响。目的:比较RT减容对身体独立老年妇女BIVA和PhA的影响。67名参与者(60岁)接受了为期20周的标准化全身RT计划(8项运动,每组3组,重复8-12次,每周3天非连续的早晨)。然后,他们被随机分配到上述训练模型所描述的三种为期八周的训练条件之一:将体积减少到一组(RV1, n = 22),两组(RV2, n = 24)或保持体积(MV, n = 21)。生物阻抗光谱根据电阻(R)、阻抗(Z)、电抗(Xc)和高度(H)测量全身水分(TBW)、细胞内(ICW)和细胞外(ECW)水分、BIVA和PhA。所有组在减容期TBW、ICW和ECW均显著增加(P结果:R、R/H、Z和Z/H在所有组中均下降,RV1和RV2组的预适应期变化显著(P结论:这些结果表明,将RV1体积减少三分之一仍可改善老年妇女的PhA、BIVA和水合状态。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
10.60
自引率
2.10%
发文量
189
审稿时长
3-6 weeks
期刊介绍: The European Journal of Clinical Nutrition (EJCN) is an international, peer-reviewed journal covering all aspects of human and clinical nutrition. The journal welcomes original research, reviews, case reports and brief communications based on clinical, metabolic and epidemiological studies that describe methodologies, mechanisms, associations and benefits of nutritional interventions for clinical disease and health promotion. Topics of interest include but are not limited to: Nutrition and Health (including climate and ecological aspects) Metabolism & Metabolomics Genomics and personalized strategies in nutrition Nutrition during the early life cycle Health issues and nutrition in the elderly Phenotyping in clinical nutrition Nutrition in acute and chronic diseases The double burden of ''malnutrition'': Under-nutrition and Obesity Prevention of Non Communicable Diseases (NCD)
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