Loads Selective Periodization Enhances Physical Performance And Did Not Modify Biochemical Parameters In Under 16 Handball Players During Preparatory

Introduction. Team hanbdall players requires a high standard of preparation in order to complete sixteen minutes of competitive play and to achieve success. Therefore, it is essential to improve the physical capabilities during the preparatory period to withstand all requirements imposed by the games and technical/tactical training. Objective. This study evaluated the effect of selective loads periodization on physical performance and biochemical parameters in Under 16 male handball players during preparatory period. Methods. Sixteen Under-16 male handball players (Age: 15.0 ± 0.8 years; Body mass: 75.0 ± 10.9 kg; Body height: 1.75 ± 0.0 m) from Caçador team (Brazil) participated in the study. Periodization of preparatory period was based on the model of Selective Loads, totaling 3 mesocycles and 10 microcyles of training. Variables of physical performance (Maximal Oxygen Uptake (VO2max), Isometric Maximum Strength, Upper and Lower Limb Muscle Power, Upper body strength and endurance, Agility and Flexibility), body composition, erythrogram and leukogram in the beginning and final preparatory period were evaluated. In order to analyze the effects of training periodization at different periods (beginning vs. final-training), the paired t-test was applied. The value of p <0.05 indicates statistical significance. Results. Loads selective periodization in the final preparatory period increased maximum isometric strength of the lower limbs and lower back muscles by 6.4% (p<0.01), muscle endurance during sit-up and push-up tests by 9.6% and 26.2% (p<0.05), muscle power of the lower limbs and upper limb muscle 6.6% and 5.7% (p<0.01), flexibility by 7.6% (p<0.01) and increased the agility of the athletes reducing the time by 3.1% (p<0.05) when compare with beginning of preparatory period. Periodization of training in the final preparatory period reduced body fat by 8.1% (p<0.01), increased the lean body mass by 3.6% (p<0.01), and there was a reduction in the fat body mass by 9,1% (p<0.01) when compared to beginning of preparatory period. The erythrocytes of Under-16 handball players were above of normal ranges in the beginning of preparatory and final preparatory period, but no difference between periods (p>0.05). There was no significant difference for the hemoglobin, mean cell volume, mean corpuscular hemoglobin in the final competitive period when compared with the beginning of preparatory period (p>0.05). Periodization of training did not modify the total count of leucocytes, neutophils, lymphocytes, monocytes, eosinophils and basophils when compared with the beginning of preparatory period (p>0.05). Conclusion. Selective loads periodization is adequate to improve the physical performance and atennuate biochemical disturbances in Under 16 male handball players during preparatory period..

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