Browsing by Author "Batalha, N."
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- Differences in swimming force metrics induced by genderPublication . Amaro, Nuno; Marinho, D.; Batalha, N.; Morouço, Pedro
- Relationship of force metrics with swimming performance in age-group swimmersPublication . Amaro, Nuno; Marinho, D.; Batalha, N.; Morouço, Pedro
- Seismic fragility functions for Portuguese RC precast buildingsPublication . Sousa, R.; Batalha, N.; Silva, V.; Rodrigues, H.Fragility functions are fundamental for the assessment of seismic safety of structures or the loss assessment of a portfolio of assets. The present paper describes a procedure to derive fragility functions representative of Portuguese reinforced concrete precast buildings. This goal was achieved following an analytical methodology considering the result of hundreds of nonlinear static analyses, whose building models reflect both mechanical and geometrical characteristics of the Portuguese industrial building stock. Considering the specificities of this typology, and in particular the connections between the structural members, a recently developed macro-element was employed, which enables the explicit simulation of friction and dowel mechanisms. The fragility analyses considered both structural and non-structural limit states, and the findings indicate a poor seismic performance, even under low seismic demand.
- A systematic review on dry-land strength and conditioning training on swimming performancePublication . Amaro, N.M.; Morouço, P.G.; Marques, M.C.; Batalha, N.; Neiva, Henrique P.; Marinho, D.A.Objectives. — The objective of this review was to examine the effects of dry-land strength and conditioning (S&C) training on swimming, and starts and turns performances. News. — S&C training is a common practice in swimming aiming to enhance performance or to prevent injuries. However, studies regarding the effects of S&C on swimming performance are scarce; the influence of age, gender or competitive level is even scarcer. Prospects and projects. — After a structured literature search, sixteen studies were included in the current review. Of those, seven did not report any positive or negative effects on swimming performance. Contrarily, most studies with positive effects were conducted with older swimmers whereas maximal strength was the most effective methodology for improving swimming performance. S&C plyometric training is suggested to be the most effective method to improve starts and turns. Future Randomized Controlled Trials should be conducted to explorethe effects of S&C induced by age and gender, on different swimming distances and techniques,and long-term training effects.Conclusion. — It is recommended that S&C training should be based on maximal strength, rangingfrom six to twelve weeks of 2 to 4 sessions per week (approximately 24 sessions altogether). Ineach session, coaches should vary from 2 to 3 sets and 3 to 5 repetitions, according to prescribedintensity. Rest intervals should range between 2 to 5 minutes and the intensity should be from 80to 90% of 1RM. Particularly regarding improving starts and turns, a S&C training regime rangingfrom 6 to 8 weeks and with 2 sessions per week is suggested. In each session, swimmers shouldperform between 1 and 6 sets and 1 and 10 repetitions, according to the established intensity.Rest between sets should range from 60 to 90 seconds. The swimmers in the included studiesare mostly men which do not allow to say if the recommendations made are gender-dependent.© 2018 Elsevier Masson SAS. All rights reserved.