163 documents found, page 1 of 17
Nonlinear Analysis of the Hand and Foot Force-Time Profiles in the Four Competi...
Bartolomeu, Raúl Filipe; Rodrigues, Pedro; Sokołowski, Kamil; Strzała, Marek; Santos, Catarina C.; Costa, M.J.; Barbosa, Tiago M.Human locomotion on water depends on the force produced by the swimmer to propel the body forward. Performance of highly complex motor tasks like swimming can yield minor variations that only nonlinear analysis can be sensitive enough to detect. The purpose of the present study was to examine the nonlinear properties of the hand/feet forces and describe their variations across the four competitive swimming stro...
A comparison of load cell and pressure sensors to measure in-water force in you...
Santos, Catarina C.; Costa, M.J.; Forte, Pedro; Marinho, D.A.The purpose of this study was to compare the in-water force of young competitive swimmers using tethered swimming and differential pressure sensors. Thirty-one swimmers (16 girls and 15 boys) were randomly assigned to perform two in-water tests. Swimmers completed two maximum bouts of 25 m front crawl with a differential pressure system and a 30 s maximum bout with an attached load cell (tethered-swimming). The...
Association between the dry-land strength & power and the kick start kinetics i...
Santos, Catarina C.; Barbosa, Tiago M.; Marinho, D.A.; Costa, M.J.The aim of this research was to determine the association between dry-land exercises and the start kinetics in elite swimmers. Fourteen swimmers (eight males and six females) included in a national team took part in this study. A fixed smith-machine was used to measure the maximal full squat strength (Smax). The height of squat (SJ) and countermovement (CMJ) jumps were collected with a contact mat. The ground r...
Technologies for the study of hydropeaking impacts on fish populations: Applica...
Alexandre, C.M.; Quintella, B.R.; Ovidio, J.; Boavida, I.; Costa, M.J.; Palstra, A.P.; Lima, R.L.P.; Lima, M.I.P; Almeida, P.R.Dam construction and streamflow regulation are increasing throughout the world, with impacts in impounded aquatic ecosystems. Hydropower dams, some of them causing a phenomenon called “hydropeaking” during their operation, are known for having a variety of impacts on downstream aquatic biota, particularly fish, and respective habitat. This can result in significant changes, from the community (e.g., fish assemb...
Force production and symmetry in water fitness exercises: a gender comparison
Santos, Catarina C.; Costa, M.J.; Bartolomeu, Raúl Filipe; Barbosa, Tiago M.; Rama, Luís M.The aim of this study was to analyse and compare propulsive forces, relative force production and symmetry between genders during water fitness exercises. Eighteen participants (women, n= 9; age: 20.67± 0.87 years; body mass: 58.18± 4.97 kg; height: 159.19± 5.85 cm; and men, n= 9; age: 22.11± 1.76 years; body mass: 72.93± 7.00 kg; height: 170.83± 5.57 cm) underwent two incremental protocols performing horizonta...
Manual de referência FPN para o ensino e aperfeiçoamento em natação: um modelo ...
Barbosa, Tiago M.; Costa, M.J.; Marinho, D.A.; Queirós, Telma Maria Gonçalves; Costa, Aldo M.; Cardoso, L.; Martins, Marta; Leite, Fernandoligadas à prática da natação e pretende, com a sua experiência na missão de melhorar as condições de prática das disciplinas competitivas, estender a todas as entidades e praticantes de atividades aquáticas os benefícios duma organização de âmbito nacional, com abrangência insular, regional e local. No âmbito do PEFPN_2014-2024, e da análise dos fatores de competitividade, da missão e visão institucionais da FP...
Fine-scale behaviour of the Lusitanian toadfish assessed in situ with the AccelTag
Pereira, T.J.; Almeida, P.R.; Quintella, B.R.; Gronningsaeter, A.; Costa, M.J.; Marques, J.P.; Costa, J.L.Three-axis acceleration sensor acoustic transmitters (AccelTag) programmed to identify specific acceleration patterns associated with particular behaviours (e.g., burrowing, attack) were used to study some aspects of the ecology of the Lusitanian toadfish Halobatrachus didactylus (Bloch & Schneider 1801). The AccelTag combines the features of archival tags (records acceleration in all three directions measuring...
Validação do método de determinação do salto vertical com recurso a um cronómet...
Costa, M.J.; Santos, Catarina C.; Esteves, Pedro; Barbosa, Tiago M.Foi objetivo do presente estudo validar um procedimento de avaliação durante a altura durante o salto vertical através do registo do tempo de voo com recurso a um cronómetro.
Is there any effect of symmetry on velocity of the four swimming strokes?
Bartolomeu, Raúl Filipe; Rodrigues, Pedro M.; Santos, Catarina C.; Costa, M.J.; Barbosa, Tiago M.The different characteristics of the four swimming strokes affect the interplay between the four limbs, acting as a constraint to the force produced by each hand and foot. The purpose of this study was to analyze the symmetry of force production with a varying number of limbs in action and see its effect on velocity. Fifteen male swimmers performed four all-out bouts of 25-m swims in the four strokes in full-bo...
The Coaches’ perceptions and experience implementing a long-term athletic devel...
Costa, M.J.; Marinho, D.A.; Santos, Catarina C.; Quinta-Nova, Luís; Costa, Aldo M.; Silva, A.J.; Barbosa, Tiago M.The aim of this study was to analyze the association between coaches’ experience and their perceptions on the implementation of a long-term athletic development (LTAD) model created in 2016 by the Portuguese Swimming Federation. Eighty-six swimming coaches were assembled in groups according to their experience level: “novice” (n = 24), “intermediate” (n = 26), and “experienced” (n = 36), and they answered a que...