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Yongming Li, Margot Niessen, Xiaoping Chen and Ulrich Hartmann

lactic share is calculated from the net accumulated blood lactate during exercise, while the anaerobic alactic share is calculated either from the fast component of VO 2 off-kinetics (PCr-La-O 2 ) 14 or from the phosphagen volume in a given muscle volume. 15 It has been demonstrated that MAOD was a

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Richard Latzel, Olaf Hoos, Sebastian Stier, Sebastian Kaufmann, Volker Fresz, Dominik Reim and Ralph Beneke

and P tot ), as well as energy share in terms of aerobic, anaerobic–lactic, and alactic energy, were calculated from VO 2 during exercise ( W aer ), net lactate production ( W blc ), and the fast component of postexercise VO 2 kinetics ( W PCr ). 14 Briefly, W aer was calculated from VO 2 above

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Emerson Franchini, Stanislaw Sterkowicz, Urszula Szmatlan-Gabrys, Tomasz Gabrys and Michal Garnys

Purpose:

This study investigated the energy system contributions of judo athletes to the Special Judo Fitness Test (SJFT).

Methods:

Fourteen male judo athletes performed the SJFT, which comprised three periods of judo activity (A = 15 s, B and C = 30 s) interspersed with 10 s rest intervals. During this test, one athlete threw two others positioned 6 m from each other using the ippon-seoi-nage technique. The fractions of the aerobic, anaerobic alactic and anaerobic lactic systems were calculated based on oxygen uptake, the fast component of excess postexercise oxygen uptake, and changes in net blood lactate, respectively. The contribution of the three energy systems was compared using a repeated measures analysis of variance and Bonferroni’s multiple comparisons test. Compound symmetry, or sphericity, was determined by Mauchly’s test. A level of significance of 5% (P < .05) was adopted in all analyses.

Results:

The alactic energy system presented a higher (F = 20.9; P < .001; power observed = 1.0) contribution (86.8 ± 23.6 kJ; 42.3 ± 5.9%) during the test when compared with both aerobic (57.1 ± 11.3 kJ; 28.2 ± 2.9%) and lactic (58.9 ± 12.1 kJ; 29.5 ± 6.2%) energy systems (P < .001 for both comparisons).

Conclusions:

The higher alactic contribution seems to be a consequence of the high-intensity efforts performed during the test, and its intermittent nature. Thus, when using the SJFT, coaches are evaluating mainly their athletes’ anaerobic alactic system, which can be considered to be the most predominant system contributing to the actions (techniques) performed in the match.

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Blake D. McLean, Donald Strack, Jennifer Russell and Aaron J. Coutts

/assessment, which has direct impact) and “slow” (ie, quality control, exploratory, and validation work, which has indirect impact) components in best practice high-performance sport models. In an NBA environment, which includes at least 82 games over a 6-month period, the “fastcomponent of the industry is