Effect of High-Intensity and Concurrent Training in Body Composition in Costa Rican Overweight and Obese Women
Cervantes Sanabria, Jorge Mario
Hernández Elizondo, Jessenia
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This study was designed to determine the changes in body composition, Body Weight (BW), Fat Mass (FM), Body Fat Percentage (BF%) and, Skeletal Muscle Mass (SMM) of High Intensity Interval Training (HIIT) and Concurrent Training (CT), comparing them to a Control Group (CG) for four months of intervention in overweight and obese women. Methodology: 67 obese and overweight women (37.54 ± 8.8 years, BMI = 28.49 ± 4.9, BF% = 43.63 ± 5.6%) were randomly assigned to three groups, HIIT (n = 26, mean age = 37.9 ± 7.3 years, BF% = 42.36 ± 4.3%), CT (n = 20, mean age = 38.0 ± 8.5 years, BF% = 45.98 ± 5.4%) and CG (n = 21, mean age = 36.6 ± 11.0 years, BF% = 42.97 ± 6.8%). Before and after 16 weeks of HIIT (intervals at ≥ 80% Maximal Heart Rate) and CT (strength training, 65%-75% 1RM + endurance training, 60%-80% Maximal Heart Rate), participants underwent Dual-Energy X-Ray Densitometry (DEXA). The CG did not exercise at all. Results: There were no changes in BW among the experimental groups (p > 0.05). Compared to CG, the HIIT and CT groups decreased FM, BF% and increased SMM (p < 0.05). CT was better than HIIT on FM (relative change, Δ%, HIIT = -3.4% vs. CT = -4.5%), BF% (HIIT = -2.6% vs. CT = -4.3%) and SMM (HIIT = +1.7% Vs. CT = +5.4%). Conclusion: Findings show improvements of body composition in overweight and obese women. In this context, although the results were not highly marked, CT seems to be a better approach for the prevention and management of the women overweight and obesity than HIIT.