목적: Breath groups are vital indicators of aerodynamic efficiency. While previous studies link vocal diseases to short MPT(Maslan et al., 2011; Kim et al., 2019), this static measure insufficiently reflects the complex coordination of running speech. This study analyzes breath group and aerodynamic indices in healthy adults relative to MPT levels. By identifying the gap between vocal capacity and performance, we aim to establish objective norms and clinical utility for running speech-based assessments. 방법: Ninety healthy adults with normal laryngeal findings and K-VHI scores were recruited, excluding those with respiratory diseases. Aerodynamic data were collected using the Phonatory Aerodynamic System(PAS). MPT was measured via sustained /a/ (static task), while breath group characteristics and airflow rates were assessed during a 'running speech' task. One-way ANOVA and Pearson correlation were used to analyze group differences based on MPT levels and the relationships between variables. 결과: Significant differences according to MPT levels were found in MPT, number of breath groups, and single breath group duration(p<.001), as well as in Total Duration (TD)(p<.05). Shorter MPT led to significantly more breath groups, with the <10s group (M=49.58) showing longer TD than the 10-19s group (M=44.17). However, no significant differences were observed in peak airflow rates. MPT correlated moderately with the number(r=-.620) and duration(r=.577) of breath groups, but showed low correlation with peak expiratory and inspiratory flow rates. 결론: This study confirms that MPT levels are closely linked to breath group patterns in running speech. The inefficient breathing observed in the <10s group suggests MPT’s potential as a predictor for dynamic speech control. These findings support the necessity of incorporating running speech analysis into clinical voice assessments.