Bustamante Sánchez, ÁlvaroTorre Gómez, Sergio de laClemente Suárez, Vicente Javier2026-07-232026-07-232026Bustamante-Sánchez, Á., De La Torre-Gómez, S., & Clemente-Suárez, V. J. (2026). Acute autonomic modulation during Jacobson’s progressive muscle relaxation in normal-weight vs. Overweight male recreational athletes. Scientific Reports, 16(1), 4732. https://doi.org/10.1038/s41598-026-35237-72045-2322https://hdl.handle.net/11268/17308Heart rate variability is a reliable non-invasive marker of autonomic nervous system activity and has been increasingly used to assess physiological responses to stress and recovery interventions. Although relaxation techniques such as Jacobson’s Progressive Muscle Relaxation are widely implemented, their acute effects on HRV across individuals with different body mass index classifications remain understudied. This study aimes to analyse HRV-based autonomic modulation during a Jacobson’s progressive muscle relaxation, and to assess differences between normal-weight and overweight recreational athletes.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Sistema nervioso autónomoFrecuencia cardíacaAtletasjournal article10.1038/s41598-026-35237-7open accessSistema nerviosoSistema cardiovascularMedicina preventivaGoal 3: Ensure healthy lives and promote well-being for all at all ages