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Physical Activity Questionnaires Do Not Accurately Estimate Fitness in Older Women

Aurora de Fátima G.C. Mafra Cabral, Marcelo Medeiros Pinheiro, Charlles H.M. Castro, Marco Túlio De Mello, Sérgio Tufik, and Vera Lúcia Szejnfeld

The objective was to compare the performance of the International Physical Activity Questionnaire (IPAQ) and Baecke questionnaire to estimate maximal oxygen uptake (VO2max) in healthy older women. One hundred healthy women aged 60 years and older answered the IPAQ and Baecke questionnaires and underwent a cardiopulmonary exercise test. The 6-min walk (6MWT), timed up and go (TUG), and handgrip strength test (HST) were also performed. Mean age and body mass index were 68.5 ± 6.3 years and 27 ± 4.7 kg/m2, respectively. No significant correlation was seen between VO2max, IPAQ and Baecke questionnaires. IPAQ did not correlate with any functional tests while Baecke correlated weakly with the 6MWT and TUG test. VO2max correlated significantly with the 6MWT (r = .38; p = .0001), HST (r = .34; p = .001), and TUG (r = −.41; p = .0001). In a multivariate regression model, TUG was the best estimator for VO2max (R 2 = .217; p = .0001). In conclusion, IPAQ and Baecke questionnaires do not associate significantly with VO2max in older women.

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Effects of Exercise on Sleep in Older Adults: An Overview of Systematic Reviews and Meta-Analyses

Felipe Fank, Franciele da Silva Pereira, Leandro dos Santos, Marco Túlio de Mello, and Giovana Zarpellon Mazo

We aimed to systematically analyze reviews of randomized clinical trials that investigate the overall effect of exercise and of different types of exercise on sleep in older adults. Meta-analysis was performed to obtain the standardized mean difference of the effect of the different types of exercise. Twenty systematic reviews published between 2012 and 2020 met the inclusion criteria of this overview. Moderate significant effects of exercise were observed on overall sleep quality and its subjective components (quality, duration, latency, habitual efficiency, medication use, and daytime dysfunction). Among the types of exercise, sensitivity analysis revealed significant effects of Pilates, Tai Chi, and Baduanjin Qigong on sleep quality. Exercise has a positive effect on sleep quality in older people. Our findings are extremely important, especially for decision makers in the health area, permitting the planning of actions and evidence-based decision making. PROSPERO registration number: CRD42020222469.

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Can IGF-1 Serum Levels Really be Changed by Acute Physical Exercise? A Systematic Review and Meta-Analysis

Diego de Alcantara Borba, Eduardo da Silva Alves, João Paulo Pereira Rosa, Lucas Alves Facundo, Carlos Magno Amaral Costa, Aldo Coelho Silva, Fernanda Veruska Narciso, Andressa Silva, and Marco Túlio de Mello

Background: Physical exercise plays an important role in metabolic health, especially in the insulin-like growth factor-1 (IGF-1) system. The objective of this study was to perform a systematic review and meta-analysis to evaluate the effects of a single endurance and resistance exercise session on IGF-1 serum. Methods: The systematic review was performed in SPORTDiscus, MEDLINE, PubMed, and Google Scholar databases. All analyses are based on random-effect models. The study identified 249 records of which 21 were included. Results: There was an effect of endurance exercise on total IGF-1 (P = .01), but not for free IGF-1 (P = .36). Resistance exercise similarly only affected total IGF-1 (P = .003) and not free IGF-1 (P = .37). The effect size indicated that total IGF-1 is more affected (ES = 0.81) by endurance than by resistance exercise (ES = 0.46). The present study showed that IGF-1 serum concentrations are altered by exercise type, but in conditions which are not well-defined. Conclusions: The systematic review and meta-analysis suggest that there is no determinant in serum IGF-1 changes for the exercise load characteristic. Therefore, physical exercise may be an alternative treatment to control changes in IGF-1 metabolism and blood concentration.

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Effects of Strength and Power Training on Neuromuscular Variables in Older Adults

Lilian França Wallerstein, Valmor Tricoli, Renato Barroso, André L.F. Rodacki, Luciano Russo, André Yui Aihara, Artur da Rocha Correa Fernandes, Marco Tulio de Mello, and Carlos Ugrinowitsch

The purpose of this study was to compare the neuromuscular adaptations produced by strength-training (ST) and power-training (PT) regimens in older individuals. Participants were balanced by quadriceps cross-sectional area (CSA) and leg-press 1-repetition maximum and randomly assigned to an ST group (n = 14; 63.6 ± 4.0 yr, 79.7 ± 17.2 kg, and 163.9 ± 9.8 cm), a PT group (n = 16; 64.9 ± 3.9 yr, 63.9 ± 11.9 kg, and 157.4 ± 7.7 cm), or a control group (n = 13; 63.0 ± 4.0 yr, 67.2 ± 10.8 kg, and 159.8 ± 6.8 cm). ST and PT were equally effective in increasing (a) maximum dynamic and isometric strength (p < .05), (b) increasing quadriceps muscle CSA (p < .05), and (c) decreasing electrical mechanical delay of the vastus lateralis muscle (p < .05). There were no significant changes in neuromuscular activation after training. The novel finding of the current study is that PT seems to be an attractive alternative to regular ST to maintain and improve muscle mass.