277 documents found, page 1 of 28
Impact of a six-week training program on physical fitness and performance of yo...
Oliveira, João P.; Marinho, D.A.; Sampaio, Tatiana; Kilit, Bulent; Morais, J. E.This study aimed to classify young tennis players into sub-groups (clusters) based on their performance and physical fitness determinants and to analyze their cluster assignment change over six weeks of intervention. A sample of young athletes aged 10–14 years was used, and players were classified according to their International Tennis Number (ITN) and various physical fitness metrics after a six-week specific...
Characterization of physical performance and change of direction deficit across...
Oliveira, João P.; Marinho, D.A.; Jacinto, Pedro; Sampaio, Tatiana; Morais, J. E.Background Volleyball performance relies heavily on agility, strength, and the ability to change direction, yet there is limited research investigating these physical attributes across different age groups in youth volleyball players. The change of direction (COD) deficit—a metric that isolates directional efficiency by comparing agility to linear speed— may provide a more nuanced understanding of an athlete’s ...
Effects of On-Court Tennis Training Combined with HIIT versus RST on Aerobic Ca...
Morais, J. E.; Kilit, Bulent; Arslan, Ersan; Bragada, José A.; Soylu, Yusuf; Marinho, D.A.The purpose of this study was to compare the effects of on-court tennis training (OTT) combined with high-intensity interval training (HIIT) or repeated sprint training (RST) on the physiological, kinematic, kinetic, and perceptual responses of young tennis players. Twenty-four male tennis players (age 13.6 ± 0.3 years) were randomly assigned to either the OTT + HIIT group (n = 12) or the OTT + RST group (n = 1...
Comparison of the Active Drag and Passive Drag Coefficients at the same Swimmin...
Lopes, Tiago J.; Pinto, Mafalda P.; Oliveira, João P.; Marinho, D.A.; Morais, J. E.; Sampaio, TatianaStudies about drag in swimming usually report or put the focus on its absolute value. However, it is being claimed that the drag coefficient better represents the hydrodynamic profile of a swimmer. Drag is strongly dependent on speed. Thus, increases in speed will lead to increases in drag. This could lead to misleading interpretations since drag is the water resistance that makes the swimmers’ displacement dif...
Kinematic and neuromuscular responses to different visual focus conditions in s...
Freitas, João; Conceição, Ana; Stastny, Jan; Morais, J. E.; Marques, Diogo L.; Louro, Hugo; Marinho, D.A.; Neiva, Henrique P.This study analyzed the kinematics and muscle activity during the stand-up paddleboarding (SUP) under different visual focus points in three conditions: i) eyes on the board nose, ii) looking at the turn buoy, and iii) free choice. Methods: Fourteen male paddleboarders (24.2 ± 7.1 years) performed three trials covering 65 m, and the electromyographic (EMG) activation patterns and kinematic parameters in four cy...
Characterization and Comparison of Athletic Performance and Change of Direction...
Oliveira, João P.; Marinho, D.A.; Sampaio, Tatiana; Carvalho, Sílvio; Martins, Hugo; Morais, J. E.Futsal players need peak strength, functional capacity, speed, and explosive lower-limb power for optimal performance. The aim of this study was to (i) characterize and compare anthropometric characteristics, lower limb strength/power, dynamic balance, linear sprint speed, COD performance, and COD deficit across young futsal age groups and (ii) identify key predictors of COD deficit. Methods: Thirty-three male ...
Characterization of physical performance and change of direction deficit across...
Oliveira, João P.; Marinho, D.A.; Jacinto, Pedro; Sampaio, Tatiana; Morais, J. E.Volleyball performance relies heavily on agility, strength, and the ability to change direction, yet there is limited research investigating these physical attributes across different age groups in youth volleyball players. The change of direction (COD) deficit-a metric that isolates directional efficiency by comparing agility to linear speed-may provide a more nuanced understanding of an athlete's movement cap...
The Associations Between the Swimming Speed, Anthropometrics, Kinematics, and K...
Pinto, Mafalda P.; Neiva, Henrique P.; Sampaio, Tatiana; Oliveira, João P.; Marinho, D.A.; Barbosa, Tiago M.; Morais, J. E.There is scarce information about what characterizes the swimming speed in the butterfly stroke and the role of thrust in its characterization and prediction. The aim of this study was to compare the fastest and poorest butterfly swimmers based on a set of anthropometric, kinematic, and kinetic variables and to identify the swimming speed predictors. Eight young male swimmers were divided into two equal groups ...
Swimming speed comparison between two distinct arm pulls during the butterfly s...
Morais, J. E.; Marinho, D.A.; Neiva, Henrique P.; Moriyama, Shin-Ichiro; Barbosa, Tiago M.The aim of this study was to compare the butterfly swimming speed during the insweep phase of two distinct arm pull patterns. Ten national-level swimmers (5 males with 17.5 ±0.8-years and 5 females with 16.8±0.9-years) were analyzed while performing butterfly all-out trials based on two distinct arm-pull patterns (“bent” and “straight”). The “bent” armpull refers to the stroke kinematics they use to swim. The “...
Effects of anthropometrics, thrust, and drag on stroke kinematics and 100 m per...
Morais, J.E.; Barbosa, Tiago M.; Gomeñuka, Natalia A.; Marinho, D.A.The aim of this study was to understand the interactions between anthropomet- ric, kinetic, and kinematic variables and how they determine the 100 m freestyle performance in young swimmers. Twenty-five adolescent swimmers (15 male and 10 female, aged 15.75 ± 1.01 years) who regularly participated in regional and national competitions were recruited. The 100 m freestyle performance was cho- sen as the variable t...