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Iñigo Mujika

Physiology & Training
Petra, Jordan (Photo: Iñigo Mujika)

Petra, Jordan (Photo: Iñigo Mujika)

In my lectures and presentations to coaches and students, I often emphasize that I do not consider training as a single isolated event, but as a cycle including the time spent training and the subsequent phase of recovery. For many years, a lot of emphasis has been placed on how to train better, harder, longer, while recovery was somewhat neglected. In the past few years, however, there has been a growing interest on recovery, with major training and sports research centers around the world building recovery facilities and studying how to improve athletes’ recovery.

These ideas on the training-recovery cycle are certainly not new. Here are some quotes from Hitchcock & Hitchcock’ 1860 book Elementary Anatomy and Physiology for Colleges, Academies and Other Schools.

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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.

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