Abstract
Despite the widespread belief that aerobic training is essential for weight loss, many runners do not experience significant changes in body weight despite weeks of habitual training. However, a closer examination shows that aerobic training can lead to meaningful improvements in body composition, even in the absence of weight reduction. Purpose: This phenomenon is displayed in the present study with an in depth statistical analysis examining the effects of marathon training in both males and females. Methods: A 16-week observational pre- and posttest design was used to determine the effects of a single phase aerobic training specific to preparing for a marathon on measures of body composition. Training volume stratification was additionally collected and analyzed. Results: Body fat measurements of subjects displayed significant improvements (P=0.001). However, body weight data displayed no change from pre-to post training in all subjects. Male subjects (N=30, mean %fat=13.19 +-6.61) improved by 1.26 percent (P=0.010), and collectively decreased body weight by 1.4 kg s (P=0.089). Female subjects (N=56, mean %fat=26.69+-6.02) also reduced percent fat measurements by 1.0 % (P=0.004), yet increased body weight by 1.2 kg s (P=0.123). Conclusion: While aerobic training may not always lead to significant changes in overall body weight, it can still display substantial improvements in body composition. These findings highlight the importance of focusing on body composition metrics rather than solely on body weight when evaluating the effectiveness of cardiovascular training programs.
Description
This study analyzes the effects of marathon training on body composition and weight.