Effects of Training with Free Weights and Training with Machines in The Presence of Intermittent Fasting: A Systematic Review

This study aims to analyse the scientific literature and highlight the effects of training with free weights compared to training using machines in the context of applying intermittent fasting as a method of manipulating body composition. Our research starts from the hypothesis that no significant differences exist between free-weight and machine-based training on body composition when intermittent fasting is applied. Materials and method: this paper is a review study aimed at analyzing the existing scientific literature on the influence of intermittent fasting on physical performance. The search for articles was conducted in October 2024, using the scientific databases PubMed, Google Scholar, and ScienceDirect. Initially, 45 articles were identified, of which 20 were selected for analysis based on various inclusion criteria. Results: The studies demonstrated that free-weight training leads to significant improvements in muscle strength, particularly for the legs and triceps.