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Effects of aerobic exercise combined with resistance training on health-related physical fitness in adolescents: a randomized controlled trial
Mendonca FR, Ferreira de Faria W, Marcio da Silva J, Massuto RB, Castilho Dos Santos G, Correa RC, Ferreira Dos Santos C, Sasaki JE, Neto AS
Journal of Exercise Science and Fitness 2022 Apr;20(2):182-189
clinical trial
6/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: Yes; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: Yes; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

BACKGROUND/OBJECTIVE: This study aimed to compare the effects of two combined training methods on health-related physical fitness components in adolescents. METHODS: Seventy-six adolescents (16.1 +/- 1.1 years, n = 44 female) were randomized into groups of moderate-intensity continuous training combined with resistance training (MICT plus RT), high-intensity interval training combined with resistance training (HIIT plus RT), or Control. The training sessions were performed twice weekly for 12 weeks. The health-related physical fitness components evaluated were: body composition, muscular and cardiorespiratory fitness. RESULTS: The intervention groups had a significant reduction in body fat percentage and improvement in abdominal repetitions and VO2peak after 12 weeks of combined exercise program (p < 0.001). Intervention effects were found to significantly reduce body fat percentage for the MICT plus RT and HIIT plus RT groups compared to the control group (mean difference -3.8; 95% CI -6.2 to -1 0.3; mean difference -4.7; 95%CI -7.1 to -2.3, respectively). For muscle fitness, significant effects of the intervention were found in increasing the number of abdominal repetitions favoring the MICT plus RT group compared to the control group (mean difference 9.5; 95% CI 4.4 to 14.7) and HIIT plus RT compared to the control group (mean difference 14.1; 95% CI 9 to 19.3). For cardiorespiratory fitness, significant effects of the intervention on improving VO2peak were found in the experimental groups (MICT plus RT versus Control group: mean difference 4.4; 95% CI 2.2 to 6.6; and HIIT plus RT versus Control group: mean difference 5.5, 95% CI 3.3 to 7.7). CONCLUSION: The results suggest that 12 weeks of training using MCIT plus RT or HIIT plus RT showed a similar effect for health-related physical fitness components in adolescents.

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