Comparison in linear speed and non-reactive agility between male youth football players selected or not selected for the national team.

Abstract: Abstract Background: Football is among the world’s most popular sports. It is played all over the world. The sport is an intermittent team sport with demands on technical, tactical, psychological and physical abilities. This study focused on the physical ability and more specifically sprinting and agility. Youth national teams are selected every year from the age of 15 and the Swedish Football Association are funding camps and friendly matches were this selected few youth players are being educated in technique, tactics, psychology and physical training. Due to the selections for the national teams taking place at the age of 15, youth players can be affected on how far they have come in the biological maturation. Aim: The aim of this study was to compare linear speed and non-reactive agility between youth football players selected or not selected for the national team. Method: The study was an observatory cross-sectional study. Twenty-three subjects from an elite club in Sweden were divided into two groups. Eleven subjects had been to a national team gathering (n=11) and twelve players from the same teams had not been invited and was one group (n=12). The subjects performed a linear sprint test and a non-reactive agility test to compare differences between the two groups. The linear sprint test consisted of a 20-meter sprint with split times at 5 and 10 meters. The non-reactive agility test was a zigzag-test over a total of 15 meter. Both tests used timing gates to record time. SPSS was used for the statistical analysis. Results: There was a statistically significantly difference (p<0.050) between the groups in the linear sprint. The national team group ran 6.6% (p=0.003) faster in the 5-meter sprint test, 2.4% (p=0.020) faster in the 5-meter sprint test and 3.4% (p=0.007) faster in the 20-meter sprint test. There were no statistically significant differences (p>0.050) in the non-reactive agility test. Conclusion: This study found a difference in sprinting ability and it could be due to the difference in the maturation phases. The biggest difference was in the shortest distance, indicating that shorter sprints are more important to develop over longer sprints. The non-reactive agility test showed no statistically significant differences. Future studies could investigate speed and agility separate with larger groups of participants and follow them over time to see if the difference in both speed and agility evens out over time, when all participants have gone trough the final stages of maturation.