Effect of two types of cross training protocols on body composition and physical fitness of young adults
Introduction: Modifications in body composition parameters are considered health risk factors. Thus, exercise programs such as Cross Training emerge as an alternative to reduce health risk factors, especially the body composition of practitioners. Aim: To compare the adaptations from 10 weeks of Cross Training performed in a grouped and alternated manner on body composition and physical fitness of active young people. Methods: Sixty adults underwent ten weeks of two Cross Training programs, organized in grouped circuit (CTG: n=26; age 26,00 ± 7,00 y; body mass 67,90 ± 10,90 kg; BMI 24,30 ± 3,10 kg/cm2) and alternated (CTA: n=29; age 27,00 ± 8,00 y; body mass 69,00 ± 10,50 kg; BMI 25,00 ± 3,60). Before and after the intervention period, the subjects were evaluated on body composition and physical fitness parameters. Body and adipose mass were evaluated by bioelectrical analyzer (bioimpedance). Verification of physical fitness was performed using isometric deadlift, handgrip test and yoyo intermittent recovery test-IR2. Analysis of variance (2x2 ANOVA) with repeated measures, followed by Bonferroni post hoc test were used to compare means and detect differences between protocols, adopting p≤0.05 for statistical significance. Percentage change and effect size were also calculated for each dependent variable. Results: After the intervention period both training protocols presented statistically significant difference in relation to time in body composition parameters (muscle mass: p≤0,001 and fat mass: p≤0,001) and cardiorespiratory fitness (p≤0,01). Regarding the maximum isometric force, the CTG showed a significant difference when compared to the initial moment (Handgrip: p=0,02; Deadlift: p=0,03), a fact observed in the CTA group deadlift (p=0,05) only, (Handgrip: p=0,08). When confronted with each other, the groups showed no statistically significant difference in any comparison. Conclusion: Both training protocols were effective for improving body composition and cardiorespiratory fitness parameters in young adults.Keywords: exercise, anthropometry, resistance training.