Validade e confiabilidade de escalas observacionais para exame de técnicas motoras do voleibol: saque por cima, bloqueio e defesa

Abstract

Objective: Elaborate, validate and test the intra and inter-expert reliability of observational scales for the examination of the volleyball techniques, floating serve with support, simple offensive blocking and underhand defense. Methods: Sixteen coaches of the brazilian national volleyball team with more than ten years of practice in this sport, participated in the validation. Each coach evaluated five actions of each volleyball technique, performed by five federated volleyball athletes. Multiple Kappa test (KM) was used for statistical analysis of inter and intra-expert agreement strength and the significance level adopted was p <0.05. Results: The three scales obtained agreement indexes (≥87.5%) for content validity. Regarding intra-expert reliability, the results demonstrated that the observational, blocks, and defense scales had good agreement strength (0.40≤KM≤0.59). Regarding the inter-expert reliability, the observational scales serve (KM=0.75) and defense (KM=0.66) presente very good agreement strength and the observational scale block (KM=0.82) obtained excellent concordance strength. Conclusions: The scales are reliable and suitable for the analysis of motor skills floating serve with support, simple offensive blocking and underhand defense.

Effect of Volleyball Training Program to Improve Reaction Time

“…Volleyball requires agility, coordination and reaction ability for playing and a good suspicion to lift and hit the ball. In volleyball, changes in the speed of game and scoring system the set finishes quickly, so players need a high level of agility, coordination and reaction ability [1], [2].…”

“…Basically, in playing volleyball, to score a point or generate points quickly, it must improve agility, coordination and reaction skills [1], [2]. One of the physical abilities is reaction, which is the ability of a person to act quickly in response to a stimulus that comes from outside either through the senses of nerves or feelings [3], [5].…”