7 documents found, page 1 of 1
Modelling and Predicting Backstroke Start Performance Using Non-Linear And Line...
Jesus, Karla de; Ayala, Helon V. H; Jesus, Kelly de; Coelho, Leandro dos S; Medeiros, Alexandre I.A.; Abraldes, José Arturo; Vaz, Mário A. P.Our aim was to compare non-linear and linear mathematical model responses for backstroke start performance prediction. Ten swimmers randomly completed eight 15 m backstroke starts with feet over the wedge, four with hands on the highest horizontal and four on the vertical handgrip. Swimmers were videotaped using a dual media camera setup, with the starts being performed over an instrumented block with four forc...
Biomechanical characterization of swimmers with physical disabilities
Ramos Junior, Valdir Rodrigues; Medeiros, Alexandre; Jesus, Kelly de; Garrido, Nuno; Corredeira, Rui; Daly, Daniel J; Fernandes, Ricardo JThe evaluation of swimming technique is one of the main aspects to be considered in any training program, with biomechanics being an important source of knowledge. It was our objective to characterize the biomechanical parameters (SL and SF) relating them to the swimming velocity (v) at different intensities and to analyze within each swimming stroke cycle the intra-cyclic velocity variation (IVV) in a group of...
The effect of different foot and hand set-up positions on backstroke start perf...
Jesus, Karla de; Abraldes, José Arturo; Mourão, Luis; Santos, Márcio Borgonovo; Medeiros, Alexandre Igor Araripe; Gonçalves, Pedro; Chainok, PhornpotFoot and hand set-up position effects were analysed on backstroke start performance. Ten swimmers randomly completed 27 starts grouped in trials (n = 3) of each variation, changing foot (totally immersed, partially and totally emerged) and hand (lowest, highest horizontal and vertical) positioning. Fifteen cameras recorded kinematics, and four force plates collected hands and feet kinetics. Standardised mean di...
Neuromuscular Activity of Upper and Lower Limbs during two Backstroke Swimming ...
Jesus, Karla de; Jesus, Kelly de; Medeiros, Alexandre Igor Araripe; Gonçalves, Pedro; Figueiredo, Pedro; Fernandes, Ricardo JA proficient start is decisive in sprint competitive swimming events and requires swimmers’ to exert maximal forces in a short period to complete the task successfully. The aim of this study was to compare the electromyographic (EMG) activity inbetween the backstroke start with feet positioned parallel and partially emerged performed with the hands on the highest horizontal and on the vertical handgrip at hands...
Are the new starting block facilities beneficial for backstroke start performance
Jesus, Karla de; Jesus, Kelly de; Abraldes, José Arturo; Medeiros, Alexandre Igor Araripe; Fernandes, Ricardo J; Vilas-Boas, And João PauloWe aimed to analyse the handgrip positioning and the wedge effects on the backstroke start perfor10 mance and technique. Ten swimmers completed randomly eight 15 m backstroke starts (four with hands on highest horizontal and four on vertical handgrip) performed with and without wedge. One surface and one underwater camera recorded kinematic data. Standardised mean difference (SMD) and 95% confidence intervals (...
Mannequin carry effort by lifesavers using different types of fins
Abraldes, José Arturo; Lima, Antônio B.; Soares, Susana; Fernandes, Ricardo J; João Paulo, Vilas-Boas. Our aim was to determine the best fin type for a 25m mannequin-carry effort. For that purpose, barefoot swimming instantaneous velocity and using four fin types was compared. The fatigue effect over 25m, considering the beginning, the middle part, and the end of the event, was also assessed. Ten national level lifesavers performed 5x25m mannequin carry efforts at maximum velocity while barefoot and while wear...
Shoulder’s abduction rehabilitation movements in deep-water: a dual-media biome...
Graça, Maria; Borgonovo-Santos, Márcio; Fonseca, Pedro; Alvarelhão, Joaquim; Fernandes, Ricardo J; Ribeiro, Andrea; Daly, Daniel; Vilas-Boas, João PauloPhysiotherapists often use deep-water exercises, combining movements under and above water. The purpose of this study was to examine the range of motion, peak velocity, phase duration and smoothness coefficient in dual-media shoulder abduction performed in deep water with different buoyancy aids and compare dominant and non-dominant upper limbs. Ten healthy right-handed and experienced participants (five men an...