Biomechanical principles in bodybuilding: Implications for performance, safety, and workforce well-being

Effective resistance training depends not only on exercise selection and training load but also on the mechanical quality of movement. In bodybuilding, appropriate movement execution may improve muscular adaptation while limiting unnecessary stress on joints and connective tissues. For fitness professionals, biomechanical competence may also have practical relevance for occupational health, professional development, and the delivery of safer exercise services. This systematic review synthesizes evidence on the biomechanical factors that influence bodybuilding-related training outcomes and injury prevention. It also explores how this knowledge may inform professional competence and staff development within fitness organizations. Nineteen peer-reviewed publications were systematically reviewed. Evidence was examined in relation to joint positioning, movement mechanics, muscle activation, load distribution, exercise technique, strength development, and injury-related outcomes. Studies were assessed according to their methodological relevance and contribution to applied resistance-training biomechanics. The reviewed evidence suggests that exercise configuration, joint positioning, and loading strategies influence muscle activation, strength, and other performance-related outcomes. However, biomechanical improvements should not be interpreted as direct evidence of reduced injury incidence unless injury outcomes were specifically measured. In professional fitness settings, such knowledge may strengthen instructional practice, technical decision-making, and the management of physically demanding work activities. Biomechanically informed training offers a practical basis for improving exercise quality and reducing preventable physical stress in bodybuilding. Its application to staff education, occupational well-being, and service quality remains a potential implication, as direct employee outcomes were not assessed. Further longitudinal research is required to evaluate these relationships over time.