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Performance analysis appears to be widely accepted by players, coaches and sports scientists as useful feedback to achieve better results on the coaching process (Liu, Hopkins, & Gómez, 2016). Although there are several studies on the different variables and performance indicators in team sports like basketball, handball or soccer (Garcia-Rubio, Gómez, LagoPeñas, & Ibañez, 2015; Prieto, Gómez, & Sampaio, 2015), there are few data on this topic in roller hockey.

The purpose of this study was to quantify the competitive balance in both men’s and women’s professional division roller hockey competitions (Spanish and Portugal leagues) comparing the results obtained according to the sex of participants. The sample was composed of 5,942 roller hockey games (2,044 in Spanish male league, 1,580 in Spanish female league, 1,814 in Portuguese male league and 504 in Portuguese female league) between the 2009-2010 and 2017-18 seasons. To calculate the competitive balance, it was used the Accumulated Points Difference index andthe one way ANOVA followed by Tukey Post Hoc multiple comparison test. The results showed that male leagues are more balanced than female (71.41±11.29 vs. 79.65±5.75 for Spanish leagues and 75.56±7.54 vs. 80.16±15.01 for Portuguese leagues). The results in relation to the sex of participants are consistent with previous studies in other sports like football. The analysis of the competitive balance could be useful for the governing body of Roller Hockey Federations to have quantitative data of the equality that exists in each league and to asses if it is necessary to introduce changes in the competition to make it more equalized in order to increase the audience.

The acute effects of fatigue on serve speed, accuracy, and consistency were examined over consecutive days of prolonged tennis match play (2,3) or when a fatiguing exercise protocol was performed (1,4) in college or high-standard tennis players. However, these previous studies showed a lack of consensus in their results. For this reason, the aim of the study was to examine the effects of fatigue in the markers of serve performance in young tennis players after performing a fatiguing intermittent exercise protocol (FITEP).

El principal objetivo de este trabajo fue estudiar la ventaja de marcar el primer gol del partido en hockey sobre patines y conocer su incidencia en el resultado final. Un objetivo secundario fue determinar si existen diferencias significativas en función de si el equipo que marca primero es el local o el visitante. Para ello se analizaron 240 partidos de la Ok Liga (la máxima categoría deportiva española) y 182 de la Primera División Nacional (segunda categoría más alta) de la temporada 2016-2017, valorando el resultado final de los equipos cuando se adelantaban en el marcador. Los resultados muestran que existe la ventaja de marcar primero tanto en la Ok Liga cómo en la Primera División Nacional con un efecto del 64.14% y 62.91% respectivamente. Asimismo, se obtiene una ventaja de marcar el primer gol significativamente mayor cuando los equipos juegan como locales en la Primera División Nacional y una alta correlación entre el rendimiento final de los equipos (puntos obtenidos en la clasificación) y la ventaja de marcar el primer gol. En consecuencia, se demuestra la importancia que tiene para un equipo dominar dicho aspecto y se sugiere que estos datos pueden ayudar a los equipos técnicos a decidir la estrategia deportiva en cada momento del juego según el resultado del marcador. Abstract: The main purpose of this study was to analyze the effect of the first goal in roller hockey and to know its impact on the final result. A secondary objective was to assess if there were significant differences when the team that scores first was the local or the visitor. For this purpose, 240 matches of Ok Liga (the highest Spanish division) and 182 of First National Division (the second highest division) were analyzed during the season 2016-2017, assessing the final result of the teams when they scored first. Results showed that the advantage of scoring first exists both in the Ok Liga and in the First National Division with 64.14% and 62.91% respectively. Likewise, the advantage of scoring the first goal when teams play at home is significantly greater for the First National Division teams than Ok Liga teams. In addition, it was obtained a high correlation between the final performance of the teams (points obtained in the classification) and the effect of scoring first. Therefore, it is demonstrated the importance for a team to dominate this aspect and it is suggested that this data can help the coach and staff to decide which strategy to use at each moment of the game according to the result. Resumo: O objetivo principal deste trabalho foi analisar a vantagem de marcar o primeiro gol do jogo em hóquei em patins e conhecer o seu impacto no resultado final. Um objetivo secundário foi avaliar se existem diferenças significativas dependendo se a equipa que pontua primeiro é a local ou a visitante. Para este fim, foram analisados 240 jogos da Ok Liga (a mais alta categoria desportiva espanhola) e 182 da Primeira Divisão Nacional (segunda maior categoria) da temporada 2016-2017, avaliando o resultado final das equipas quando estavam à frente no placar. Os resultados mostram que há a vantagem de marcar primeiro tanto na Ok Liga quanto na Primeira Divisão Nacional, com um efeito de 64.14% e 62.91%, respetivamente. Da mesma forma, obtém-se uma vantagem de marcar o primeiro gol significativamente maior quando as equipas jogam em casa na Primeira Divisão Nacional e uma alta correlação entre o desempenho final das equipas (pontos obtidos na classificação) e a vantagem de marcar o primeiro gol. Consequentemente, demonstra-se a importância que tem para uma equipa a dominar esse aspecto e sugere-se que esses dados possam ajudar às equipas técnicas a decidirem a estratégia tática a ser utilizada em cada momento do jogo de acordo com o resultado do placar.

El objetivo de este trabajo fue comparar y cuantificar las asimetrías neuromusculares entre las extremidades inferiores que presentan los jugadores de hockey sobre patines. Un objetivo secundario fue correlacionar el índice de asimetrías (ASI) entre las diferentes pruebas neuromusculares testadas. Un total de 27 jugadores de sexo masculino de hockey sobre patines (edad = 20,59 ± 3,81 años) realizaron diferentes pruebas neuromusculares de forma unilateral: 1) Test de salto vertical con contra-movimiento (SLCJ), 2) Batería de saltos horizontales (Hop test: single, triple y crossover hop test) y 3) Prueba de velocidad con cambio de dirección (COD test). Se observaron diferencias significativas (p 10% en el test de SLCJ, situación considerada como posible factor de riesgo de lesión. Solamente se obtuvo una correlación significativa entre el SLCJ y el COD test. En consecuencia, y con el objetivo de identificar las asimetrías entre miembros inferiores, es importante considerar la valoración de las diferencias capacidades neuromusculares. The aim of the current study was to compare and quantify the neuromuscular lower limb asymmetries present in roller hockey players and its link to high risk of injury. A secondary purpose was to correlate the index of asymmetries (ASI) between the different neuromuscular tests performed. 27 male roller hockey players (age = 20.59 ± 3.81 years) performed the single leg countermovement jump (SLCJ), the Hop Test battery (single hop test, triple hop test and crossover hop test) and the change of direction test (COD test). Significant differences were observed (p 10% in the SLCJ, a situation considered as an injury risk factor. Only a significant correlation was obtained between the SLCJ and the COD test. Consequently, it is suggested that the complete neuromuscular profile between lower limbs be evaluated with the different tests, for both in the conditioning programs and in the injury prevention and return-to- play.

Recently, some authors suggested that many unilateral actions (e.g. jumping and changes of direction) a team sport player is required to perform in practice or match occur not only in the vertical direction but also in horizontal and lateral direction (Hewit et al., 2012; Meylan, et al., 2010). Therefore, when assessing unilateral tasks it’s important to consider different directions to create an accurate profile player