Examinando por Autor "Marzuca-Nassr, Gabriel Nasri"
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Ítem Editorial: Spotlight on aging: physiology, prevention, and management of skeletal muscle atrophy(Frontiers Media SA, 2023) Marzuca-Nassr, Gabriel Nasri; Peñailillo, Luis; Valladares-Ide, Denisse; Martinez-Huenchullan, Sergio; Curi, Rui; Hirabara, Sandro Massao; Vitzel, Kaio FernandoIntroduction: Atrophy of skeletal muscle during aging is a subject of heightened interest for researchers, as the muscle tissue is an essential regulator of whole-body metabolism, bone health, fall prevention, cognitive function, and general wellbeing. Indeed, the precise role of skeletal muscle and strategies to prevent the loss of skeletal muscle mass in individuals aged 60 years or older have been reported (Marzuca-Nassr et al., 2020a; Marzuca-Nassr et al., 2023). For example, previous studies demonstrated that skeletal muscle atrophy caused by aging can be attenuated/prevented using appropriate therapeutic strategies, including different physical exercise modalities, nutritional supplementation, and medications (Marzuca-Nassr et al., 2020b; Cuyul-Vasquez et al., 2023). However, the most appropriate exercise, supplement, or medication, individually or in combination, remains undefined. Thus, identifying the most effective strategies to attenuate or reverse skeletal muscle atrophy in this particular population is crucial. Towards this goal, the Frontiers in Physiology Healthy Aging series Research Topic Spotlight on Aging: Physiology, Prevention, and Management of Skeletal Muscle Atrophy was created. We encouraged researchers investigating the physiology of skeletal muscle atrophy, with an emphasis on the following subjects: skeletal muscle architecture and mechanical properties in older individuals and/or exercise modalities, oral supplements, medications, or other therapeutic alternatives that prevent and/or manage skeletal muscle atrophy, to submit their Original Research, Systematic Review (with or without Meta-analysis), or any other article type within the scope of the journal, section, and Research Topic for consideration for publication in the Healthy Aging series. It is important to point out that the objective of this Research Topic is in line with the United Nations Decade of Healthy Aging (2021–2030) Sustainable Development Goals, #SDG3, #SDG10, and #SDG11, which collectively seek to improve lives of older people, their families, and communities. Below, we selected several examples of manuscripts that address some of these Research Topic subjects and provide future directions.Ítem Next steps to advance general physical activity recommendations towards physical exercise prescription: a narrative review(BMJ Publishing Group, 2023-10) Festa, Raúl Ricardo; Jofré-Saldía, Emilio; Candia, Alejandro A; Monsalves-Álvarez, Matías; Flores-Opazo, Marcelo; Peñailillo, Luis; Marzuca-Nassr, Gabriel Nasri; Aguilar-Farias, Nicolas; Fritz-Silva, Nicole; Cancino-Lopez, Jorge; Soto-Sánchez, Johana; Sepulveda, Carlos; Huerta Ojeda, Álvaro; Núñez-Espinosa, Cristian; Valladares-Ide, Denisse; Jannas-Vela, SebastianPhysical inactivity is a major health concern, associated with the development of several non-communicable diseases and with an increased mortality rate. Therefore, promoting active lifestyles has become a crucial public health necessity for enhancing overall health and quality of life. The WHO guidelines for physical activity (PA) present valuable contributions in this respect; however, we believe that greater specificity should be added or complemented towards physical exercise (PE) testing, prescription and programming in future recommendations. In this review article, we suggest simple and practical tools accessible to the entire population to improve the specificity of this approach, highlighting aspects of PE programming used by trained subjects. By adopting these suggestions, exercise professionals, clinicians and physical trainers can optimise the current general PA recommendations towards PE prescription to improve fitness status and encourage PE adherence in the general population. © 2023 BMJ Publishing Group. All rights reserved.Ítem Postural balance and body mass index in older adults; a descriptive and associative study testing traditional risk factors(Sociedad Medica de Santiago, 2023-07) Caparrós-Manosalva, Cristián; Marzuca-Nassr, Gabriel Nasri; Muñoz-Mendoza, Carmen Luz; Espinoza-Araneda, Jéssica; Bravo-Carrasco, Valeria; Muñoz, JavierBackground: There is a scarcity of information about how much the postural balance parameters, as the area and mean velocity of the center of pressure (CoP), can be modified by traditionally adiposity markers in older adults. Objectives: To describe and associate postural balance parameters in Chilean older adults with different BMI. A second objective was to associate the area of balance with weight. Methods: In a descriptive study, Chilean older adults (mean age; 70 ± 1.0, BMI 29.0 ± 0.4 kg/m2) were categorized by a normoweight control group (CG, n = 7, BMI; 23.1 ± 0.5), overweight (OvW, n = 41, BMI; 27.6 ± 0.2), and obesity (Ob, n = 23, BMI; 34.2 ± 0.5). The subjects were evaluated on a stable/hard [HS]/soft [SS] surface, and under open [OE]/ closed [CE] eyes. Secondary outcomes were weight, height, BMI, and functional health. Univariate test and linear regression were applied. Results: CoP mean velocity on the HS and CE, showed significant differences between CG vs. OvW groups (24.9 ± 7.4 mm/s vs. 12.1 ± 0.97 mm/s, p < 0.0001). There were significant differences in Romberg index between CG vs. OvW group (176.7 ± 16.4% vs. 132.4 ± 7.1%, p = 0.002), and between CG vs. Ob group (176.7 ± 16.4% vs. 129.4 ± 17.2%, p = 0.005). On the SS with OE, there were significant differences between CG vs. OvW groups (29.8 ± 4.8 mm/s vs. 18.6 ± 1.2 mm/s, p < 0.003), and, on the SS, with CE, between CG vs. OvW groups (41.5 ± 31.2 mm/s vs. 24.6 ± 15.2 mm/s, p = 0.015). Conclusions: At higher BMI such as at overweight or obesity conditions, older adults show a reduced ‘CoP mean velocity’ than control normoweight peers’, being‘weight’ a traditional adiposity risk factor predictor of balance performance. © 2023 Sociedad Medica de Santiago. All rights reserved.