The Effects of Resistance Training on Multiple Health Conditions. A Comprehensive Review

Background: Resistance training (RT) is widely recognized for enhancing muscular strength and hypertrophy. Recent research highlights its broader impact on cardiovascular, metabolic, skeletal, and mental health across diverse populations. Aim: This review aims to assess the physiological, psychological, and clinical effects of RT, emphasizing its role in preventing and managing chronic diseases and mental health conditions. Materials and Methods: This narrative review is based on 40 peer-reviewed publications, including randomized controlled trials, systematic reviews, and observational studies. Relevant literature was identified through searches in PubMed, Scopus, Web of Science, and the Cochrane Library for articles published between 2015 and 2025, using terms such as “resistance training,” “cardiovascular health,” “metabolic function,” “mental health,” and “bone density.” Studies were included if they reported clinical or physiological outcomes related to RT in adults. Non-English publications, case reports, and animal studies were excluded. Results: RT is associated with reductions in blood pressure, improved insulin sensitivity, enhanced bone mineral density, and modulation of systemic inflammation. Mechanistically, it influences neuroplasticity, vascular function, and metabolic pathways such as Akt/mTOR signaling and nitric oxide synthesis. RT also contributes to reduced symptoms of depression and anxiety, improved cognitive performance, and better quality of life. Effective interventions typically involve moderate-to-high intensity exercises targeting major muscle groups, performed two to three times per week. However, challenges in individual adherence and program customization remain. Conclusions: RT is a valuable non-pharmacological strategy for preventive and rehabilitative care. Its broad health benefits support its integration into clinical and public health frameworks. Future studies should aim to refine training protocols, personalize interventions for specific populations, and investigate synergistic effects with other therapies.