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      A Pilot Study of Influence of Endurance Training on the Prooxidative and Antioxidant Status of Women after Breast Cancer

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          Abstract

          The objective of this study was to assess the effect of 8-week long endurance training on the prooxidative–antioxidative status of plasma in women treated for breast cancer. The participants of the study were 12 women after radical mastectomy aged 45 to 56 years (M = 50.6 ± 2.9 years), who had undergone full cancer treatment, on average more than 5 years after the treatment (M = 5.9 ± 0.9 years). Body mass components were measured twice using the method of bioelectric impedance analysis. In order to optimize training loads and to assess the level of exercise tolerance of the participants, the group was subject to an ergospirometric exercise test twice, before (1st) and after (2nd) the completion of the training cycle. The blood was also taken twice for biochemical analyses. Statistically significant differences were noted in the maximum exercise load, the level of which increased in the second test ( p < 0.05). No change was observed in the level of antioxidative potential, i.e., the content of some variables, ferric reducing ability of plasma (FRAP), urea, total phenolics, thiobarbituric acid reactive substances (TBARS), and in the blood indices of the body’s nutritional status during the project (total protein, albumin. Endurance training caused an increase in exercise tolerance and did not cause an aggravation of oxidative stress in women undergoing breast cancer treatment.

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          Most cited references43

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          The ferric reducing ability of plasma (FRAP) as a measure of "antioxidant power": the FRAP assay.

          A simple, automated test measuring the ferric reducing ability of plasma, the FRAP assay, is presented as a novel method for assessing "antioxidant power." Ferric to ferrous ion reduction at low pH causes a colored ferrous-tripyridyltriazine complex to form. FRAP values are obtained by comparing the absorbance change at 593 nm in test reaction mixtures with those containing ferrous ions in known concentration. Absorbance changes are linear over a wide concentration range with antioxidant mixtures, including plasma, and with solutions containing one antioxidant in purified form. There is no apparent interaction between antioxidants. Measured stoichiometric factors of Trolox, alpha-tocopherol, ascorbic acid, and uric acid are all 2.0; that of bilirubin is 4.0. Activity of albumin is very low. Within- and between-run CVs are <1.0 and <3.0%, respectively, at 100-1000 micromol/liter. FRAP values of fresh plasma of healthy Chinese adults: 612-1634 micromol/liter (mean, 1017; SD, 206; n = 141). The FRAP assay is inexpensive, reagents are simple to prepare, results are highly reproducible, and the procedure is straightforward and speedy. The FRAP assay offers a putative index of antioxidant, or reducing, potential of biological fluids within the technological reach of every laboratory and researcher interested in oxidative stress and its effects.
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            Assay for lipid peroxides in animal tissues by thiobarbituric acid reaction.

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              Does physical activity attenuate, or even eliminate, the detrimental association of sitting time with mortality? A harmonised meta-analysis of data from more than 1 million men and women.

              High amounts of sedentary behaviour have been associated with increased risks of several chronic conditions and mortality. However, it is unclear whether physical activity attenuates or even eliminates the detrimental effects of prolonged sitting. We examined the associations of sedentary behaviour and physical activity with all-cause mortality.
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                Author and article information

                Contributors
                Role: Academic Editor
                Role: Academic Editor
                Journal
                Int J Environ Res Public Health
                Int J Environ Res Public Health
                ijerph
                International Journal of Environmental Research and Public Health
                MDPI
                1661-7827
                1660-4601
                10 March 2021
                March 2021
                : 18
                : 6
                : 2822
                Affiliations
                [1 ]Department of Physiology and Biochemistry, Poznan University of Physical Education, 61-871 Poznań, Poland; podgorski@ 123456awf.poznan.pl (T.P.); j.krysciak@ 123456awf.poznan.pl (J.K.)
                [2 ]Faculty of Health Sciences, Calisia University, 62-800 Kalisz, Poland; a.janiak@ 123456akademiakaliska.edu.pl
                [3 ]Department of Anthropology and Biometry, Poznań University of Physical Education, 61-871 Poznań, Poland; demuth@ 123456awf.poznan.pl (A.D.); czerniak@ 123456awf.poznan.pl (U.C.)
                [4 ]Province Polyclinic Hospital, 62-504 Konin, Poland; paper5@ 123456tlen.pl
                Author notes
                [* ]Correspondence: domaszewska@ 123456awf.poznan.pl ; Tel.: +48-(61)-835-51-90
                Author information
                https://orcid.org/0000-0001-8117-1714
                https://orcid.org/0000-0003-0745-4606
                Article
                ijerph-18-02822
                10.3390/ijerph18062822
                7999469
                6dd2d94b-8b48-48fb-ad0c-54b7ee97e6e6
                © 2021 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 06 January 2021
                : 08 March 2021
                Categories
                Article

                Public health
                frap,tbars,anaerobic threshold,peakvo2
                Public health
                frap, tbars, anaerobic threshold, peakvo2

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