engleski

Can anaerobic energetic capacity be estimated from a primarily aerobic energetic capacity test protocol?

Purpose : Soccer today emphasizes players fitness abilities more than it has in past. Players ability to perform well throughout all 90 minutes is a must (Stølen, Chamari, Castagna, & Wisløff , 2005)children and adults with different levels of expertise. Soccer performance depends upon a myriad of factors such as technical/biomechanical, tactical, mental and physiological areas. One of the reasons that soccer is so popular worldwide is that players may not need to have an extraordinary capacity within any of these performance areas, but possess a reasonable level within all areas. However, there are trends towards more systematic training and selection influencing the anthropometric profiles of players who compete at the highest level. As with other activities, soccer is not a science, but science may help improve performance. Efforts to improve soccer performance often focus on technique and tactics at the expense of physical fitness. During a 90-minute game, elite-level players run about 10 km at an average intensity close to the anaerobic threshold (80-90% of maximal heart rate. As well as aerobic energetic capacity, anaerobic energetic capacity is well measurable and sports scientists can have a good insight into the level of fitness for each player in the team. One of the aims of soccer is to postpone the eff ects of fatigue (Mohr, Krustrup, & Bangsbo, 2005). The goal of this study is to determine if there is any correlation between the distance run above the anaerobic threshold (VT2) in an incremental test to volitional exhaustion, and anaerobic energetic capacity estimated from a single ramp test protocol. Methods : In Sports diagnostic center at Faculty of Kinesiology University of Zagreb 132 senior soccer players (20, 9±3, 5 yrs, 171, 4±6, 2 cm, 76, 4±7, 6 kg) of national and international level were tested on an incremental all-out test (every 30’’ increment of 0, 5 km/h, with constant inclination of 1%) for determining VO2max and 300m ramp test (15x20m continuous dash) for estimation of their anaerobic capacity. Pearson’s correlation coefficient was calculated for the relationship between distance run above the speed that corresponds to the AnT (VT2) up to vmax, and the speed in the 300 meters sprint test. Results : The maximal speed achieved at 18, 0±1, 4 km/h, VO 2max was 60, 0±4, 9 ml/kg while the values at the VT2 were, the speed at 13, 6±1, 1 km/h, and VO2 was 50, 6±4, 2 ml/kg (84, 5±3, 5 %VO2max ). The distance run above the VT2 until exhaustion was 1180, 6±266, 6 m. Average speed at 300m sprint test was 16, 1±0, 6 km/h. The correlation was found between the distance run above the VT2 until exhaustion and average speed in 300m (r=0, 5 p<0, 5). Conclusion : While the found correlation is not great, it is still considerable and indicates that the distance that is run above the VT2 in a protocol designed for determination of aerobic energetic capacity is related to performance in a typical anaerobic energetic capacity test. Therefore, it is possible to gain insight into the anaerobic fitness of soccer players even if we only perform an aerobic fitness test.

anaerobic energetic capacity ; aerobic energetic capacity ; fitness tests

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