Evaluating the Effects of an 8-Week Zumba Exercise Program on Physical Fitness in Sedentary Women: A Randomized Controlled Trial

Abstract

Objectives. This study aimed to evaluate the impact of an 8-week Zumba exercise program on physical fitness and body composition among sedentary women. The primary goals were to assess changes in muscle mass, flexibility, back strength, cardiovascular fitness, body weight, and body fat percentage. Materials and methods. Twenty-four female volunteers (mean age: 22.30 ± 2.10 years, height: 162.80 ± 4.00 cm) from North India were randomly assigned to either an experimental group, participating in a structured Zumba program (60-minute sessions, thrice weekly), or a control group, maintaining their usual activities. The initial and follow-up assessments comprised the measurement of height, weight, Body Fat Percentage (BFP), Body Muscle Mass (BMM), grip strength, back strength, flexibility, and Maximal Oxygen Consumption (VO₂max). Results. The statistical analysis conducted using the SPSS 26 software and the Wilcoxon Signed-Rank Test revealed significant improvements in the experimental group. Body weight decreased from 58.20 ± 5.10 kg to 56.80 ± 5.00 kg (p = 0.002), body fat percentage dropped from 25.10 ± 5.80% to 23.80 ± 6.00% (p = 0.03), and body muscle mass increased from 20.40 ± 3.20 kg to 21.00 ± 3.30 kg (p = 0.04). Grip strength improved from 32.50 ± 5.00 kg to 33.20 ± 4.80 kg (p = 0.05), back strength rose from 85.00 ± 22.00 kg to 105.00 ± 25.00 kg (p = 0.001), flexibility increased from 31.00 ± 2.80 cm to 34.00 ± 2.50 cm (p = 0.002), and VO₂Max increased from 41.00 ± 5.00 ml/kg/min to 44.00 ± 4.50 ml/kg/min (p = 0.001). No significant changes were observed in the control group. Conclusions. The 8-week Zumba program significantly enhanced physical fitness and body composition in sedentary women, improving muscle mass, flexibility, back strength, and cardiovascular fitness. These findings support Zumba as an effective and enjoyable exercise option, promoting an active lifestyle and better health outcomes, reinforcing its role as a comprehensive fitness solution suitable for encouraging sustained physical activity.