Posts etiquetados en ‘Sprint’

Improving the value of fitness testing for football

Por Iñigo Mujika , el 21 de May de 2014

Material para tests de rendimiento (Foto: Iñigo Mujika)

David B. Pyne, Matt Spencer, Iñigo Mujika.

International Journal of Sports Physiology and Performance. Volume 9, Issue 3, May 2014, 511 – 514.

Abstract

One of the challenges for sports scientists working in football is to balance the needs for routine fitness testing with daily fatigue and well-being monitoring to best manage the physical preparation of players. In this commentary, the authors examine contemporary issues of fitness testing in football to identify ways of improving the value of routine testing and monitoring. A testing program must be well planned and organized to ensure that the results are useful. Different tests can be employed for younger and older players. A rigorous approach to analysis and interpretation of results is desirable, and database management must address both short- and long-term requirements of players, staff, and programs.

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Fitness determinants of repeated-sprint ability in highly trained youth football players

Por Iñigo Mujika , el 9 de April de 2012

Matt Spencer, David Pyne, Juanma Santisteban, Iñigo Mujika.

International Journal of Sports Physiology and Performance. 2011 Dec; 6(4):497-508.

Variations in rates of growth and development in young football players can influence relationships among various fitness qualities. Purpose: To investigate the relationships between repeated-sprint ability and other fundamental fitness qualities of acceleration, agility, explosive leg power, and aerobic conditioning through the age groups of U11 to U18 in highly trained junior football players. Methods: Male players (= 119) across the age groups completed a fitness assessment battery over two testing sessions. The first session consisted of countermovement jumps without and with arm swing, 15-m sprint run, 15-m agility run, and the 20-m Shuttle Run (U11 to U15) or the Yo-Yo Intermittent Recovery Test, Level 1 (U16 to U18). The players were tested for repeated-sprint ability in the second testing session using a protocol of 6 × 30-m sprints on 30 s with an active recovery. Results: The correlations of repeated-sprint ability with the assorted fitness tests varied considerably between the age groups, especially for agility (= .02 to .92) and explosive leg power (= .04 to .84). Correlations of repeated sprint ability with acceleration (= .48 to .93) and aerobic conditioning (= .28 to .68) were less variable with age. Conclusion: Repeated-sprint ability associates differently with other fundamental fitness tests throughout the teenage years in highly trained football players, although stabilization of these relationships occurs by the age of 18 y. Coaches in junior football should prescribe physical training accounting for variations in short-term disruptions or impairment of physical performance during this developmental period.