Abstract
Background: Resistance training (RT) has been established as the most efficient approach for lean body mass maintenance required for preserving a sufficiently high metabolism during weight loss. Objective: This study aimed to evaluate the impacts of the ketogenic diet (KD) and regular diet (RE) in combination with 8-week resistance exercise (RT), on body weight, body fat mass (BFM), and lean body mass (LBM) of untrained individuals. Methods: Twenty untrained participants were randomly assigned to the RE+RT and KD+RT as control and experimental groups, respectively. Sixty to ninety minutes of diversified resistance exercise were performed by both groups, three sessions weekly, and diet was self-administered with a recommended daily energy and protein intakes. Body composition was measured using a Bioelectrical Impedance Analyzer. One-way Analysis of Covariance (ANCOVA) was applied to analyze the data. Results: The results showed a greater post-intervention adjusted mean for body weight and LBM in the normal dietary group in comparison with the experimental group. After controlling for baseline measurements, there was a statistically significant difference in body weight (p < .0005) and BFM (p =.001) between groups. Conclusion: Resistance training along with a ketogenic diet may decrease BFM without notable changes in LBM, whilst RT on a normal diet might increase LBM without remarkably influencing BFM.
Highlights
The global prevalence of obesity has increased at an alarming rate, signalling an urgent need for safe, effective and sustainable weight-loss strategies
A major concern connected with the efficiency of any regime for losing weight is its effect on body composition, making it difficult to compare the effectiveness of various diets based on the reduction of body weight alone
Bodyweight was greater in the regular diet (RE)+Resistance training (RT) group (M = 68.21, standard errors (SE) = 0.48 kg) compared to the ketogenic diet (KD)+RT group (M = 63.93, SE = 0.48 kg) post-intervention after controlling for baseline body weight
Summary
The global prevalence of obesity has increased at an alarming rate, signalling an urgent need for safe, effective and sustainable weight-loss strategies. Numerous slimming diets that reduce body fat occurs with an implicit lean body mass (LBM) reduction, which in many instances, it has been suggested as a justification for the long run fail of several weight-loss programs [9]. This is because maintaining or increasing LBM is important for preserving a sufficiently high metabolism to minimize the tendency of weight return, which is the main problem regarding the socalled “yo-yo” effect [10] apart from keeping adequate body function with aging [11]. Resistance training (RT) has been established as the most efficient approach for lean body mass maintenance required for preserving a sufficiently high metabolism during weight loss
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