Comparison of bioelectrical impedance – derived phase angle in vegan and omnivorous exercisers
DOI:
https://doi.org/10.1590/1980-0037.2026v28e109764Keywords:
Body Composition, Eletric Impedance, VegansAbstract
Phase angle (PhA) is a parameter obtained through electrical bioimpedance, that can be used to indicate health, nutritional, and functional status in different populations. Vegans tend to have a higher percentage of body fat and lower muscle mass than omnivores, but it is unknown whether the PhA is different between these two groups. This study aims to compare the PhA and body composition of physically active omnivorous and vegan individuals. This cross-sectional study involved 30 exercisers (12 men and 18 women), divided into a vegan group (VG; n = 15) and an omnivore group (OG; n = 15), matched for sex (6 men and 9 women in each group), age, height, and body mass (maximum difference of 5%). A scale, a stadiometer, and octopolar bioimpedance were used to measure body composition. Right arm PhA was lower in vegans (p = 0.036; d = 0.805), omnivores consumed more protein/kg of body weight daily (p = 0.026; d = 0.856), and vegans consumed more fiber daily (p < 0.001; d = -1.610). There were no significant differences in other dietary intake and body composition parameters between vegans and omnivores. Similarities in PhA and body composition were observed between vegan and omnivorous individuals, but with lower right arm PhA in the VG.
References
Baumgartner RN, Chumlea WC, Roche AF. Bioelectric impedance phase angle and body composition. Am J Clin Nutr. 1988;48(1):16-23.
Mensink GBM, Barbosa CL, Brettschneider AK. Prevalence of persons following a vegetarian diet in Germany. J Health Monit. 2016;1(2):2-14.
Mundstock E, Amaral MA, Baptista RR, Sarria EE, Dos Santos RR, Rodrigues CAG, et al. Association between phase angle from bioelectrical impedance analysis and level of physical activity: systematic review and meta-analysis. Clin Nutr. 2019;38(4):1504-10.
Castizo-Olier J, Irurtia A, Jemni M, Carrasco-Marginet M, Fernández-García R, Rodríguez FA. Bioelectrical impedance vector analysis (BIVA) in sport and exercise: systematic review and future perspectives. PLoS One. 2018;13(6):e0197957.
Larsson CL, Johansson GK. Dietary intake and nutritional status of young vegans and omnivores in Sweden. Am J Clin Nutr. 2002;76(1):100-6.
IBOPE Inteligência. Pesquisa de opinião pública sobre vegetarianismo [Internet]. São Paulo: IBOPE Inteligência; 2018 [cited 2025 Mar 5]. Available from: http://old.svb.org.br/images/Documentos/JOB_0416_VEGETARIANISMO.pdf
Al-Mohaithef M. Prevalence of vegan/vegetarian diet and eating behavior among Saudi adults and its correlation with body mass index: a cross-sectional study. Front Nutr. 2022;9:966629.
Pinckaers PJM, Trommelen J, Snijders T, van Loon LJC. The anabolic response to plant-based protein ingestion. Sports Med. 2021;51 Suppl 1:59-74.
Dawczynski C, Weidauer T, Richert C, Schlattmann P, Dawczynski K, Kiehntopf M. Nutrient intake and nutrition status in vegetarians and vegans in comparison to omnivores: the Nutritional Evaluation (NuEva) Study. Front Nutr. 2022;9:819106.
Jedut P, Glibowski P, Skrzypek M. Comparison of the health status of vegetarians and omnivores based on biochemical blood tests, body composition analysis and quality of nutrition. Nutrients. 2023;15(13):3038.
Mattiello R, Amaral MA, Mundstock E, Ziegelmann PK. Reference values for the phase angle of the electrical bioimpedance: systematic review and meta-analysis involving more than 250,000 subjects. Clin Nutr. 2020;39(5):1411-7.
Coelho-Ravagnani CF, Borges DSL, Reis CR. Avaliação multiprofissional do atleta. Campo Grande: Ed. UFMS; 2022.
Shim JS, Oh K, Kim HC. Dietary assessment methods in epidemiologic studies. Epidemiol Health. 2014;36:e2014009.
Cohen J. A power primer. Psychol Bull. 1992;112(1):155-9.
Hopkins WG, Marshall SW, Batterham AM, Hanin J. Progressive statistics for studies in sports medicine and exercise science. Med Sci Sports Exerc. 2009;41(1):3-13.
Nabuco HCG, Silva AM, Sardinha LB, Rodrigues FB, Tomeleri CM, Ravagnani FCP, et al. Phase angle is moderately associated with short-term maximal intensity efforts in soccer players. Int J Sports Med. 2019;40(11):739-43.
Coelho-Ravagnani CF, Lopes LCC, Godois AM, Silva CV, Nascimento-Ferreira MV, Nabuco HCG, et al. Association between phase angle from bioelectrical impedance and dietary intake in athletes: a cross-sectional study. J Nutr Sci. 2025;14:e38.
Hevia-Larraín V, Gualano B, Longobardi I, Gil S, Fernandes AL, Costa LAR, et al. High-protein plant-based diet versus a protein-matched omnivorous diet to support resistance training adaptations: a comparison between habitual vegans and omnivores. Sports Med. 2021;51(6):1317-30.
Morgan BP. The membrane attack complex as an inflammatory trigger. Immunobiology. 2016;221(6):747-51.
Jäger R, Kerksick CM, Campbell BI, Cribb PJ, Wells SD, Skwiat TM, et al. International Society of Sports Nutrition position stand: protein and exercise. J Int Soc Sports Nutr. 2017;14(1):20.
Cirillo ELR, Cirillo FT, Pompeo A, Santos AS, Ferreira JS, Nunes JPR, et al. As relações entre a composição corporal, ângulo de fase da bioimpedância e força em adolescentes atletas paranaenses. Motricidade. 2023;19(1):1.
Van Vliet S, Burd NA, van Loon LJC. The skeletal muscle anabolic response to plant- versus animal-based protein consumption. J Nutr. 2015;145(9):1981-91.
Tang JE, Moore DR, Kujbida GW, Tarnopolsky MA, Phillips SM. Ingestion of whey hydrolysate, casein, or soy protein isolate: effects on mixed muscle protein synthesis at rest and following resistance exercise in young men. J Appl Physiol (1985). 2009;107(3):987-92.
Coelho-Júnior HJ, Marques FL, Sousa CV, Marzetti E, Aguiar SDS. Age- and sex-specific normative values for muscle mass parameters in 18,625 Brazilian adults. Front Public Health. 2024;11:1287994.
Bosy-Westphal A, Danielzik S, Dörhöfer RP, Later W, Wiese S, Müller MJ. Phase angle from bioelectrical impedance analysis: population reference values by age, sex, and body mass index. JPEN J Parenter Enteral Nutr. 2006;30(4):309-16.
Campa F, Thomas DM, Watts K, Clark N, Bazzocchi A, Cavedon V, et al. Reference percentiles for bioelectrical phase angle in athletes. Biology (Basel). 2022;11(2):264.
Rauma AL, Mykkänen H. Antioxidant status in vegetarians versus omnivores. Nutrition. 2000;16(2):111-9.
Zachariah VK, Priyamvada PS. Bioimpedance analysis: basic concepts. J Ren Nutr Metab. 2023;8(1):30-4.
Melina V, Craig W, Levin S. Position of the Academy of Nutrition and Dietetics: vegetarian diets. J Acad Nutr Diet. 2016;116(12):1970-80.
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Copyright (c) 2026 Gianfranco Sganzerla, Pedro Henrique Hernandes, Beatriz de Oliveira Oshiro, Fabricio Cesar de Paula Ravagnani, Luis Alberto Gobbo, Christianne de Faria Coelho-Ravagnani
This work is licensed under a Creative Commons Attribution 4.0 International License.
This work is licensed under a Creative Commons Attribution 4.0 International License.
