Frequent Immediate Knowledge of Results Enhances the Increase of Throwing Velocity in Overarm Handball Performance

Abstract

In the present study, the effect of frequent, immediate, augmented feedback on the increase of throwing velocity was investigated.

Relationship between Upper Quarter Y Balance Test performance and throwing proficiency in adolescent Olympic handball players

“…Based on the present findings, shoulder mobility/stability as assessed by the YBT-UQ did not predict shooting velocity and accuracy in adolescent Olympic handball players. The finding that YBT-UQ and throwing performance solely showed small correlations goes in line with Štirn et al [38] who reported a high number of factors contributing to the final ball velocity. Therefore, throwing was described as a highly multi-factorial skill, which cannot be predicted only based on the assessment of stability and mobility of the upper extremities [38].…”

“…The finding that YBT-UQ and throwing performance solely showed small correlations goes in line with Štirn et al [38] who reported a high number of factors contributing to the final ball velocity. Therefore, throwing was described as a highly multi-factorial skill, which cannot be predicted only based on the assessment of stability and mobility of the upper extremities [38]. Eriksrud [14] also reported no correlation between mobility and stability values as assessed through the hand reach star excursion balance test and throwing velocity in elite female Olympic handball players.…”

Reliability and Accuracy of Ball Speed During Different Strokes in Young Tennis Players

“…Post-impact ball speed was measured using a radar gun (Stalker ATS II Professional Sports Radar, Plano, TX, USA; accuracy±1.6 km·h −1 ; range of velocity: from 1.6 to 1287 km·h −1 ; frequency: 34.7 GHz). This device has been validated and used in previous human experiments to measure sprint running 9 10 , kicking 29 and throwing the ball 28 . For the groundstrokes, the researcher in charge of measuring the ball speed held the radar gun and stood about 2 m behind the player adjusting position according to the point where the player hit the ball, and with the radar axis aligned in the direction and height of the ball trajectory (according to radar gun specifications).…”

Confiabilidade De Um Método Simples Para Mensuração Da Velocidade Da Bola No Arremesso Do Handebol Confiabilidade No Arremesso Do Handebol

“…Ainda com a utilização desse mesmo método, foi realizado uma pesquisa, com indivíduos do sexo masculino com média de 21 anos de idade e do sexo feminino com média de idade de 21 anos em que realizaram o arremesso em uma primeira sessão os atletas do sexo masculino apresentaram a velocidade da bola com o menor valor de 74,2 km/h (20,61 m/s) e maior valor de 105 km/h (29,17 m/s) e as atletas do sexo feminino foram encontrados o menor valor de 48,8 km/h (13,55 m/s) e o maior valor de 78 km/h (21,67), após os arremessos foi dado aos indivíduos um feedback a respeito dos arremessos. A velocidade da bola foi novamente mensurada em outra sessão, encontrando o menor valor de 79 km/h (21,94 m/s) e valor máximo de 108 km/h (30 m/s) para atletas do sexo masculino e de mínimo 50,8 km/h (14,11 m/s) e máximo de 81,1 km/h (22,53 m/s) para atletas do sexo feminino (ŠTIRN et al, 2017). Apresentando resultados menores aos encontrados no presente estudo pelos atletas do sexo masculino e resultados maiores aos mensurados nesse estudo pelas atletas do sexo feminino.…”