Understanding the biomechanics of music-induced emotions: A study of physical responses to rhythm and melody

This study investigated the biomechanical aspects of music-induced emotions through a comprehensive analysis of physical responses to rhythm and melody among 28 participants in China. Using high-precision physiological monitoring equipment, this study measured Heart Rate Variability (HRV), Muscle Activation (MA), Galvanic Skin Response (GSR), and Body Sway Patterns (BSP) in response to standardized musical stimuli. Results revealed distinct physiological response patterns between rhythmic and melodic elements. Rhythmic stimuli elicited more robust cardiovascular responses, with mean HRV increases of 15.4 ± 1.7 bpm during fast rhythms (132–144 BPM) compared to 5.2 ± 1.1 bpm for melodic features (p < 0.001, d = 1.24). Muscle tension significantly correlated with rhythmic elements (r = 0.81, p < 0.001) and demonstrated progressive adaptation, with response latencies decreasing from 285 ± 42 to 156 ± 28 ms over exposure time. Melodic features induced more varied responses, with ascending phrases increasing HRV by 4.8 ± 0.9 bpm while sustained notes decreased it by 3.6 ± 0.8 bpm. Analysis of self-reported emotions strongly correlated with physiological measures, particularly for high-intensity emotional states (concordance rate: 92.1 ± 3.2%, α = 0.91). The study revealed a hierarchical organization in rhythm processing, with MA showing the quickest response (178 ± 25 ms), followed by HRV (245 ± 35 ms) and GSR (475 ± 62 ms). These findings provide quantitative evidence for the differential impact of rhythmic and melodic elements on physiological responses, contributing to this work’s understanding of music-induced emotional processing and its potential applications in therapeutic contexts.