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The Journal of Sports Medicine and Physical Fitness 2021 Nov 25

DOI: 10.23736/S0022-4707.21.12727-6

Copyright © 2021 EDIZIONI MINERVA MEDICA

lingua: Inglese

Effect of exercise on phase angle in cancer patients: a systematic review

Alexandre D. MARTINS 1, 2, 3 , Rafael OLIVEIRA 1, 2, 4, João P. BRITO 1, 2, 4, Tiago COSTA 1, Júlia SILVA 1, Fátima RAMALHO 1, 5, Rita SANTOS-ROCHA 1, 5, Nuno PIMENTA 1, 5

1 Sports Science School of Rio Maior, Polytechnic Institute of Santarém, Rio Maior, Portugal; 2 CIEQV, Life Quality Research Centre, Rio Maior, Portugal; 3 Comprehensive Health Research Centre (CHRC), Departamento de Desporto e Saúde, Escola de Saúde e Desenvolvimento Humano, Universidade de Évora, Évora, Portugal; 4 CIDESD, Research Center in Sport Sciences, Health Sciences and Human Development, Vila Real, Portugal; 5 CIPER, Interdisciplinary Centre for the Study of Human Performance, Faculty of Human Kinetics (FMH), University of Lisbon, Cruz Quebrada, Portugal


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INTRODUCTION: Body composition is one of the main variables of interest in clinical practice in cancer patients. Specific markers from bioelectrical impedance analysis, such as phase angle (PhA), have been assuming increasing relevance in this population. The aim of the present systematic review was to study and systematise the effect of exercise on PhA in cancer survivors, as compared to control conditions, namely usual care, with no exercise. The effect of exercise on PhA in the population of cancer survivors is not yet established.
EVIDENCE ACQUISITIONː This systematic review was conducted on October 13, 2021, through PubMed, Web of Science, Wiley Online Library, Directory of Open Access Journals, Science Direct and JSTOR, following PRISMA guidelines and PICOS model that include: cancer survivors with ≥18 years; intervention of any exercise program for the target group; comparison between intervention group and control group that followed control conditions, namely usual care, with no exercise; outcome related to PhA; and studies of randomized control trials.
EVIDENCE SYNTHESIS: We founded a total of 1244 publications, using selected keywords. Eight studies were included in this systematic review, after inclusion/exclusion criteria considered. Compared with the control conditions, exercise training programs seem associated with a positive effect on PhA, both in solid tumours and haematologic cancer types, but only when using resistance exercise alone. According to the best evidence synthesis criteria, we could not conclude the superiority of any exercise program analysed in the value of the PhA.
CONCLUSIONS: There were several exercise details that may have potential to be beneficial for PhA in cancer patients, including an early start of the exercise intervention (during treatment and immediately after discharge from hospital), the use of resistance exercise or/and aerobic exercise, and mainly a long follow-up period (≥ 4 months) to verify the structural effects of exercise on the PhA. However, there were no effects on the PhA value immediately after the intervention, regardless of the type of protocol and the intervention time.


KEY WORDS: Cancer patients; Phase angle; Physical exercise; Bioimpedance

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