The aims of this study were to assess (a) the validity of total body load (TBL)-obtained from the global position system (GPS) devices-to quantify soccer training load, assessing its relationship with session rating of perceived exertion (session-RPE) and (b) to analyze the differences in terms of TBL and session-RPE among defenders, midfielders, and forwards. Twenty-two professional soccer players (Spanish first division, season 2007-2008; 26.74 ± 4.2 years; height 179.74 ± 4.04 cm; weight 73.7 ± 3.35 kg) participated in the study. During 13 training sessions composed predominantly of small-sided games, TBL and RPE multiplied by the minutes of session duration were determined using GPS and the 21-point scale, respectively. In each session, data from 10 players randomly selected and classified according to player position (defenders, midfielders, and forwards) were collected. Although session-RPE was a significant predictor of TBL (β = 0.23, p < 0.05), this method only accounted for 5% of the variance in TBL. No significant differences in terms of TBL and session-RPE were found regarding player position. The results of this study suggest that TBL is not a valid measure to quantify training load because it is not strongly correlated with session-RPE. Furthermore, TBL and session-RPE in small-sided soccer games do not vary according to player positions.

Abstract:The purpose of this study was to determine the inter-machine reliability attained from devices used to measure the common variables in sports performance.

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BackgroundPeople with intellectual disabilities (ID) seem to have a lower physical fitness (PF) than their peers without disabilities which coincides with reduced autonomy, life expectancy and quality of life. To assess PF in these individuals, it is necessary to use appropriate tools that permit the assessment of their physical capacities taking into account their specific characteristics. The aim of this work is to study the feasibility and reliability of the Alpha-Fit test battery for adults in a group of men and women with mild to moderate ID. MethodForty-one adults with ID of both sexes, ranging in age from 20 to 60 years old, participated in the study. To identify the feasibility and reliability of the Alpha-Fit test battery for adults, two complete assessments were done for each one of the tests included in the battery. The assessments were performed for a period of no more than two weeks (test-retest). An intraclass correlation coefficient (ICC) was used to determinate test-retest reliability, and a mixed ANOVA factorial was used for each of the dependent variables. Bland-Altman plots were also used to assess consistency between the two measurements. Feasibility was calculated as the percentage of people who were able to perform the tests correctly (not feasible <50%, fairly feasible 50%-75%, and feasible >75%).In order to determine other psychometric properties, minimal detectable change (MDC) and standard error of measurement (SEM) were also calculated. ResultsOf the 10 tests in the Alpha-Fit test battery, 8 were shown to be feasible. High reliability was obtained (> .90) for the variables related to body composition. In the hand-grip test, reliability was high in the men's group, but low in the women's group. Good reliability results were also found (.80-.89) in the dynamic sit-up test for women, but not for men. Fair reliability (.70-.79) was found in jump-and-reach and neck-shoulder mobility tests. The variables in the 2km walk and agility tests indicated poor reliability. Al tests showed SEM values related to high variability. However, Bland-Altman plots showed results related to lack of consistency. ConclusionsThe feasibility and reliability calculations, as well as the SEM values, confirm that not all the tests of the Alpha-Fit Test Battery for Adults are suitable for the assessment of PF in adults with ID, probably because of the complexity of the motor fitness tests. The authors emphasise the necessity of making adaptations to the protocols used, or of using other tests more appropriate to the characteristics of people with mild to moderate ID.

Se analizó la relación entre test físicos y rendimiento en Barras Paralelas (BP), Barra Fija (BF) y Caballo con Arcos (CA) en diez gimnastas varones de alto nivel. Se estimó la potencia media relativa al trepar 5m una cuerda (T5), la fuerza relativa al realizar máximas repeticiones de olímpicos desde escuadra (MRO), la flexibilidad activa (A) y pasiva (P) de flexión cadera (2A y 2P), y su abducción desde flexión a 90º (3A y 3P) y el rendimiento competitivo mediante el promedio de las notas finales (NF) en dos competiciones consecutivas. Existen relaciones significativas entre MRO con BP (r = 0,825; p<0.05) y BF (r = 0,678; p<0.05), entre 2A con la NF en BP (r = -0,842) y BF (r = -0,696), entre 3A y la NF en BP (r = 0,629) y entre 3P y la NF en CA (r = 0,652) y BF (r = 0,815). En estos gimnastas se relacionó la capacidad manifestada en test de fuerza y flexibilidad con el rendimiento manifestado en CA, BP y BF.Palabras clave: gimnasia artística; preparación física; rendimiento. R e s u m e nCorrespondencia/correspondence: Juan Antonio León-Prados Facultad del Deporte. Departamento de Deporte e Informática. Universidad Pablo de Olavide. Carretera de Utrera Km.1 C.P. 41013 Sevilla. España. e-mail: jaleopra@upo.es We analyzed the relationship between physical-test with the performance in Parallel Bar (BP), High Bar (BF) and Pommel Horse (CA) in ten elite gymnasts. The average power expressed on rope climbing 5m (T5) and the relative strength when performing maximum repetitions of L-support pike press to handstand (MRO) was estimated, the active (A) and passive (P) hip flexibility (2A and 2P), and his abduction from 90º hip-flexion (3A and 3P) and the competitive performance by averaging Final Score (NF) in two consecutive competitions. Significant relationships show between MRO with BP (r = 0.825; p <0.05) and BF (r = 0.678; p <0.05), between NF 2A with BP (r = -0.842) and BF (r = -0.696), 3A and NF BP (r = 0.629) and between the NF 3P and CA (r = 0.652) and BF (r = 0.815). In these gymnasts significant relationships were found between the competitive performance in CA, BP and BF and the strength and flexibility physical-test.Key words: gymnastics; physical preparation; competitive performance. A b s t r a c tRecibido el 9 de junio 2010; Aceptado el 27 de diciembre de 2010 doi:10.5232/ricyde2011.02206León-Prados, J. A.; Gómez-Piriz, P.T.; . Relación entre test físicos específicos y rendimiento en gimnastas de elite. Revista Internacional de Ciencias del Deporte, 22(7), 58-71.